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Seagull Caliber St1902

Seagull Caliber ST1902

Seagull Caliber St1902

Manufacturer Seagull
Caliber Number ST1902, ST-1902, ST19, 1902
Based On
Venus 175
Movement Type
Mechanical chronograph, manual-wind
Lignes
13.75”’
Diameter
31.3mm
Height
6.25mm
Jewels
22
Beats per hour 21,600 vph
Power Reserve
~42 hours (also seen reports of 51 hours)
Anti-Shock System Incabloc
Chronograph System
Column Wheel
Hand-Windable? Yes
Hacking Seconds? No
Functions Central hours, central minutes, small seconds at 9:00, 30 min chronograph subdial at 3:00, 12 hour subdial at 6:00
Country of Manufacture China
Known Models
Invicta 5105 (Add your watch to the comments below…)

The Sea-Gull caliber ST1902 is a mechanical hand-wound chronograph movement. This caliber is known to be based off of the Venus caliber 175. At one point a legend was circulating around the internet claiming that this series of movements is not only based on Venus calibers, but also manufactured on the same machines. If anyone has actual proof of this claim, please share in the comments below.

6:00 Subdial:

This movement is essentially a 2 subdial chronograph. The 6:00 subdial on the caliber ST1902 is often simply listed as a 12 hour subdial, causing confusion about the functionality. This is not a 12 hour totalizer subdial for the chronograph complication. It is a 12 hour hand that matches the main central hour hand.

Is ST1902 the same as ST19?

You may see the caliber number for this movement shortened to just ST19. This is accurate as the base caliber number, but it is not accurate when talking specifically about the ST1902. With ST19XX, the last two digits indicate different versions or complications added to the base ST19 (ST1901).

ST1902 VS TY2902:

As is common with watch calibers of Chinese origin, there is confusion with the caliber number system. The caliber ST1902 is the same as TY1902.

Replacement Prices:

At the time of this post, replacement prices for the Seagull caliber ST1902 were found online for around $110.00 USD.

Additional Image Gallery:

Seagull Cal St19 Chronograph

Seagull Caliber St1902 Mechanical 10 Seagull Caliber St1902 Mechanical

Seagull Caliber St19

Additional Resources:

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Community Reviews & Questions:

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38 Comments
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Chuck
Chuck
2 years ago

I had a watch with this and I got rid of it. It looks nice on the backside but there are better variations of the ST19 IMHO. I never understand this movement and the hand at 6:00? It doesnt do anything, it doesnt even tell the 24 hour time or a second time. Is it just a decoration?

Gerald Bean
Gerald Bean
2 years ago
Reply to  Chuck

Chinese movements are known for having extra functions that have no purpose. Swiss would never put a hand that does nothing.

Hans
Hans
2 years ago
Reply to  Gerald Bean

No? How about Longines, using a closed date window on its retrograde military watch as many other Watchmakers do for some models. Nothing wrong with that idea. It does creates a ghost position for the Crown, yes. Perhaps we should skip the idea that Chinese craftmanship is …crap?

Rocco
Rocco
1 year ago
Reply to  Hans

Chinese craftsmanship is crap compared to Swiss or German. Now, i will say they have improved significantly but they are not on the level of other manufacturers in Europe.

Copium
Copium
1 year ago
Reply to  Rocco

Lmao cope. Educate yourself please

HoustonReal
HoustonReal
1 year ago
Reply to  Gerald Bean

The Venus 17x family had several variants, and I believe Sea-Gull just updated and copied the existing variants.

Charles
Charles
2 years ago

Beautiful movement.

Ed
Ed
2 years ago

Beautiful movement

GARY
GARY
2 years ago

Would this movement fit in a speed master case.

Gary
Gary
2 years ago

Can you fit a st1902 into a copy speedmaster ? And where can you buy the movement ring

Mark L.
Mark L.
2 years ago
Reply to  Gary

Anything is possible but the subdials aren’t all real chronograph subdials. Just make a cool watch why copy one?

Gary
Gary
2 years ago
Reply to  Mark L.

My watch is a replica speedmaster automatic and the dials do nothing. That is why i would like to fit a st1902 movement because its hand wind and the stop watch will work.

trackback
China Made: Tianjin Watch Factory - SaFonaGastroCrono
2 years ago

[…] día de hoy, el calibre cronográfico ST19 resulta uno de los más interesantes de todo el mercado, tanto por sus aspectos técnicos como por […]

Geoff
Geoff
2 years ago

Definitely a BM, a beautiful movement!

Sam
Sam
2 years ago

Do you know what the lift angle is for the ST19?

Brian Centeno
Brian Centeno
2 years ago
Reply to  Sam

my question too

Jean du Moulin
Jean du Moulin
1 year ago
Reply to  Brian Centeno

About 54 to 55 degree angle, Brian.

Jean du Moulin
Jean du Moulin
1 year ago
Reply to  Sam

Hi Sam, about 54 to 55 degree angle.

Derek
Derek
1 year ago
Reply to  Sam

If it is the same as the Venus 175 it would be 52 degrees

Ian Watson
Ian Watson
1 year ago

I was wondering, seeing as this is the Venus 175 in everything but name, I have a NOS Sekonda 3017 dial and wondered if the dial would fit this as the dial is fitment for a Venus 150 aka the Strela. Anyone know?

Ian Watson
Ian Watson
1 year ago

I got my first true mechanical chronograph, an Alpha 1993 Daytona “panda” and wow it does not disappoint, esp with the display caseback and I am just sitting here watching all the little extra mechanisms do their thing.

On mine the 6 subdial is a true 24hr clock, a bit pointless on any watch really as all you have to do is add or subtract 12 hours and spending time in the army its how you read time anyway but its a feature that does show AM or PM if nothing else.

stephane
stephane
1 year ago

Does anyone know where to find some compatible “balance wheels” or “balance wheel assemblies” for such ST19 ?

stephane
stephane
1 year ago
Reply to  calibercorner

Thank you for your answer …

i was wondering if some ST16 / ST25 balance wheels (not the full assembly, but the wheel and spring) could be compatible, since i suspect the same origin for some of them (from pictures) + the fact that seagull has an incabloc system that was not proposed on the venus 175 : the reedition may have taken parts from other movements that are standalone and not copies from others (i thus suspect those two but possibly other could be …)

Did someone tried the ST16/ST25 balance swap ? with or without success ??

Jean du Moulin
Jean du Moulin
1 year ago
Reply to  stephane

Esslinger might have some Seagull parts actually. Even the Seagull factories themselves might sell you the part(s). Sometimes even as a courtesy to their clientèle.

Jean du Moulin
Jean du Moulin
1 year ago
Reply to  Jean du Moulin

With ‘sometimes even as a courtesy to their clientèle’, I meant saying that sometimes they give it even for free as a courtesy to their clients/consumers.

Stephane
Stephane
1 year ago
Reply to  Jean du Moulin

Dear Jean, unless you may have a contact (?), i already tried by email and the seagull factory contacts i have from their website did not sell balance parts even in quantities (which is a common problem). CousinUK has some winding stems only. I also buy broken watches/movements to have some parts, but now i’m with a -1 balance (and a -1 click spring, which is more easily fixable if i take time to manualy build a new one …)

trackback
In Review: The Hemel Air Wing Chronograph – WristWatchReview
1 year ago

[…] aside, let’s take a closer look at this watch. Based on the Seagull ST19 manual wind bi-compax movement, the watch has pushers to control elapsed seconds and minutes. A […]

Chute Welder
Chute Welder
1 year ago

What proof do you have that this movement is NOT made with Swiss cooperation? Russia bought the rights to this movement and also the Valjoux 7733 from Switzerland and manufactured them as as various 3000 Calibers of Poljot. This was just one of several movements licensed from Switzerland by Russia. The upgrade of this movement to high beat took place in Russia as the Venus 175 was 18,000. Even with help from Russia, it’s hard to conceive that China could manufacture this movement without Swiss assistance. As for the machinery used, that’s an open question.

Juan-Gijón.España.
Juan-Gijón.España.
10 months ago
Reply to  Chute Welder

y de acuerdo, calibre Venus 175 actualizado.El que tengo del los años 1940, es de 18000 alternancias y sin incabloc, lógicamente.

MT
MT
1 year ago

I have two watches with this movement, 1963 and a Sugess 50 fathom homage. Both are running within 10 sec a day and has not missed a beat. Love the action of the chronograph.

steve
steve
9 months ago

would a venus 188 movement fit into one of these cases.

Dennis
Dennis
8 months ago

Absolutely beautiful movement

George
George
3 months ago

I assembled Speedmaster homage with that movement a couple weeks ago and tonight I am up to 52 hours since fullly wound. Quite pleasantly surprised.

Zachmonoda
Member
2 months ago

Question: What are actual experiences about reliability? I have a few ST19 watches in a shopping cart (1963, Speedy and other homages), but the calibre seems to run into frequent(?) problems with the column-wheel and/or levers bumping off alignment, which kills the chronograph functions. Simple fix for a watchmaker, but a pricey repair! Is this exaggerated or a real and likely failure hazard? The candidate watches are just too neat to pass, well made, at 1/10th the price of low end Swiss chronograph watches. It is interesting and worth mentioning, that the lower end “affordable” Swiss watches up to 2… Read more »

10tocantes
10tocantes
2 months ago
Reply to  Zachmonoda

Too early to report anything about reliability given that I’ve only owned my ST1902-based Phylida SP-31 for a couple of days but I can state this: 1) this caliber does feel (yes feel) a bit weak/fragile. Why? Because of the push buttons and observations of the movement through the glass caseback. 2) the start/stop push button gives a very good/very firm clic on the finger on starting and stopping there chronograph but the double crunching fed back from the column wheel on restarting the chronograph does feel a bit strange. 3) there is absolutely no clic feeling on pushing on… Read more »

10tocantes
10tocantes
3 days ago
Reply to  10tocantes

Well, after just a couple of month, the reset lever broke; maybe it was poorly manufactured hence why resetting the chrono felt so weak at the push button. Anyway, I contacted the Phylida seller and he’s sending me the necessary replacement part. Very glad about this because I keep reading that getting parts for ST19 movements from Seagull is mission impossible. Other than that, it’s been a great movement so far, very accurate and excellent power reserve well over 52hrs, even with chronograph running permanently.

Seagull Caliber St19

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