Seiko Caliber 7s36

Seiko Caliber 7S36

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Seiko Caliber 7s36

Manufacturer Seiko
Caliber Number 7S36, 7S36C
Movement Type Automatic
Jewels 23
Vibrations Per Hour
21,600 bph
Shock System Seiko Diashock
Power Reserve
41+ hours
Magnetic Resistance 4,800 A/m (60 gauss)
Winding Direction
Not hand-windable
Hacking? No
Diameter 12”’ / 27mm
Height 4.8mm
Functions Hours, minutes, central seconds, day/date calendar
Country of Manufacture Japan/Malaysia
Known Brands
Seiko 5 Sport SNZG15J1 (add more in the comments below)

The Seiko caliber 7S36 is an automatic movement used in many popular Seiko divers and the entry level Seiko 5 watches. This movement was first released to the market in 1996. Seiko dive watches, such as the Orange Monster, have since been upgraded to the caliber NH36 (aka 4R36), making Seiko collectors happy because the 7S36 seen here does not hack and is not hand-windable – two functions that have become more and more popular. The caliber 7S36 is the last in the series.

Operational temperature range: Between -10 ºC and 60 ºC (Between 14 ºF and 140 ºF)

Other movements in this series:

Submitted by Daniel who says:
Been a solid runner, it gains about 30 sec or so a day.

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[…] 7S36 […]

Neteacher
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Neteacher

My watch is very irregular, gains between 80-125 seconds /day.
First two weeks was -5sec/day, then +15sec/day. After two months was about +60 sec/day and now +80 to+125 sec/day.
Moreover SEIKO’s official service is opened only few hours during the week so it extremally difficult to repair it.

Todd Caldwell
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Todd Caldwell

Sounds like it could be lightly magnetised. If you have a friendly local watchmaker, he can run it over the demagnetiser for you, which takes 15 secs . And as I said, if he is friendly, it would be at no cost. It is the first step in diagnosing that issue.

Gary
Guest
Gary

My son and I both have a Seiko SNZG15J1 with this movement. His gains 27 s/day, about what you would expect. Mine is unusual… it only gains 1.7 s/day, which I have carefully verified over a 2 week test period. Just good luck, I guess, but amazing performance for the price.

Zul
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Zul

I just bought last week, and my problem with this 7s36c sometime even i use the nedlle got stop

Fred VonFirstenberg
Guest
Fred VonFirstenberg

“sometime even i use the nedlle got stop”

What does this mean?

marc luscher
Guest
marc luscher

ESL translation problem. the user has had the second hand stop while wearing the watch

Eamonn
Guest

27s/d is quite a lot should say. Even if it’s a 7S one it can operate between COSC parameters, all my 7S are regulated and operate at less -/+ 5 s/d.

Oilseed
Guest
Oilseed

what’s the difference between the original 7S36, the 7S36B and the 7S36C??

Eamonn
Guest

Main differences between those are improvements done on the materials used but mainly the movement is the same, I mean same configuration same fonctions. Is like reviewed and improved version nothing else.

John van Abkoude
Guest
John van Abkoude

I own a Seiko SNZF17K1 with this caliber. Can I somehow upgrade it to a caliber that has second hacking and hand winding?

Elijah
Guest
Elijah

I ve a seiko snzb24j1 it works amazing I would wish my best friends go for it. It doesn’t gain or loss anything. I don’t regret at all.

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[…] Seiko Caliber 7S36, 23-jewel automatic (self-winding) movement […]

Kit
Guest
Kit

Had this for 2 yrs – its now gaining 10 minutes a day and bracelet is scratching easy on strap.

Jeevan
Guest
Jeevan

I recently bought a Seiko 5 Sea Urchin SNZF17 (7s36 movement) and while setting the time, day and date; I accidentally turned the crown in a counter clockwise direction. Would that be a problem for the watch?

Justin Hogge
Guest
Justin Hogge

I hope someone else comments on this too, but from the little bit I know, that’s no problem to turn the crown counterclockwise. You can set the time clockwise or counterclockwise. If you go the wrong way when setting the date, it will click… you probably shouldn’t do this a lot. One thing you don’t want to do is set the date while the time is between 8:00 PM and 4:00 AM.

Jeevan
Guest
Jeevan

Thanks Justin for the reply!

Tran
Guest
Tran

I bought a 7S36C. I’m wonderig about it a fake one. Please help me to verify it. Serial No. on case is 832160

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