Unitas 6497 in a Victorinox Swiss Army AirBoss Watch

ETA/Unitas Caliber 6497

Unitas 6497 in a Victorinox Swiss Army AirBoss Watch

BrandUnitas
Caliber Number6497
Movement TypeManual wind
Size (lignes)
16.5”’
Diameter
36.6mm
Height
4.5mm thick
Jewels17
Power Reserve
46 hours (6497-1) / 53 hours (6497-2)
Vibrations Per Hour
18,800 bph (6497-1) / 21,600 bph (6497-2)
Lift Angle
44 degrees
Shock SystemIncabloc
Winding DirectionUni-directional
Hacking?
No
FunctionsCentral hours, central minutes, small seconds at 9:00
Country of ManufactureSwitzerland
Known Brands
Panerai, Victorinox Swiss Army Airboss Mach 4 (pictured), too many to list…add your watch in the comments below

The ETA/Unitas caliber 6497 is a Swiss made mechanical manual wind movement with 17 jewels. This movement is often confused with the ETA/Unitas 6498. This caliber is one of the most popular hand-wound mechanical movements in the watch industry. The 6497 is often referred to as a “pocket watch movement” because that is the origin of the design. Thanks to its large diameter, the 6497 is often found in flieger style pilot watches.

Non-Hacking:

The 6497 is a non hacking caliber, but there are brands (such as Chronoswiss) that have heavily modified base 6497 movements and added hacking mechanisms. If you know of a specific 6497 based caliber with an additional hacking module added, please mention it below.

Crown/Stem Removal:

The 6497 has a set lever detent screw to keep the stem in. In order to remove the crown and stem from the movement, first pull the crown out one click to time setting mode. Locate the small screw near the stem (see image below). Very carefully unscrew to loosen it, but do not go too far to fully remove it – unscrewing too much will likely result in screwing up (pun intended) the keyless works, which means pulling off the hands and dial to put the set lever back in place.

Eta 6497 Crown Stem Removal

In ETA’s own words: “First pull the winding stem to position 2 (time setting), then unscrew the screw (see marking) a maximum of 2 turns to loosen the setting stem.”

Caliber Drawings:

Eta Unitas 6497 Drawings

Watches With This Caliber:

The movement pictured above is from a Victorinox Swiss Army Airboss Mach 4. Please add yours to the comments below.

Additional Resources:


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Paul
Paul
7 years ago

My favorite movement by far. So much to look at.

Tom
Tom
3 years ago
Reply to  Paul

Agree. It’s beautiful and so clear to see all the moving parts. I can’t wait to get a watch with a caliber 6497 movement inside.

shmuel penchas
shmuel penchas
5 years ago

Shmuel penchas

Bert Kanne
Bert Kanne
3 years ago

I have a watch with a movement described as 9372 calibre. It is a Chinese movement based on this Unitas, no question about it. It is described as 21 jewel, 21,600, 36 hour reserve.

Tom
Tom
3 years ago
Reply to  Bert Kanne

Who described the movement that way? What brand watch is it? Thanks.

Bert Kanne
Bert Kanne
3 years ago
Reply to  Tom

The watch brand is DM1936. The description of the movement is from their website.

Dustin
Dustin
1 year ago
Reply to  Bert Kanne

The 6497-1 beats at 18,800, the 6497-2 beats at 21,600.

Otto
Otto
2 years ago

Is this a hacking movement?

Carlos Aguila
Carlos Aguila
12 days ago
Reply to  Caliber Corner

What is the power reserve of fully wound barrel in this movement?

R Currell
R Currell
1 year ago

I have this movement in a steinhart watch and for the money paid I am very pleased indeed with the movement and the watch overall, in fact very,very pleased.

trackback
Weiss 42mm Standard Issue Field Watch – Beans & Bezels
10 months ago

[…] movement is based on a standard ETA/Unitas 6497, and I believe it is finished, assembled and regulated in-house. Their website isn’t clear […]

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R&R – How To Become A Watchmaker - FIFTH WRIST
8 months ago

[…] 17.33 ETA Unitas 6497 movement […]

Luis Estrada
Luis Estrada
2 months ago

Laco has a version of the 6497 with hack function for a top grade Flieger watch.

Lasse Myrdal
Lasse Myrdal
1 month ago

My Tissot, best watch i have. Best regards from Norway

IMG_20210825_211947.jpg
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Eterna: Forgotten Founder of ETA - Lugs and Lume
27 days ago

[…] also acquired A. Reymond SA in 1932, which brought Unitas under the umbrella. The Unitas 6497 has been used by way too many brands to name, but probably the most notable would be Panerai. […]

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