Isa Caliber 336

ISA Caliber 336/168

Isa Caliber 336

Manufacturer ISA
Caliber Number 336/168, 32577-7
Type Quartz
6.75”’ x 8”’
15.3mm x 17.8mm
Battery Cell Number SR626SW (377)
Battery Life
See below
Motor System
Rotary stepping motor (60 steps/min)
Functions Central hours, central minutes, small seconds at 6:00
Country of Manufacture Far East Assy (China)
Known Models
Invicta Russian Diver 7275 (Add your watch in the comments below…)

ISA caliber 336 is 5 jewel quartz movement that is made in China. This caliber is part of the ISA Slender family of quartz movements. It is considered to be a repairable movement by ISA, but finding parts may be challenging.

The most up to date tech sheets on this caliber appear to be from 07/01/06. ISA is no longer producing movements and this caliber has been discontinued. At the time, ISA had offices in Switzerland, France, and Hong Kong.

Caliber Number:

Watches with this caliber are usually marked ISA Cal. 336, but the full caliber number of this particular version is 336/168. The second set of numbers after the dash depend on the hand configuration. This movement is also signed 32577-7 with the letter K nearby (if you have insight as to what this number is, please comment below).

Similar Calibers:

There are similar caliber numbers based on the 336 family of ISA movements.

  • 336/101 – Central seconds
  • 336/130 – Hours and minutes only, no seconds
  • 336/168 – Small seconds at 6:00

Expected Battery Life:

ISA claims that a new battery in the 336/168 movement will last for about 44 month.

This movement has a hacking mechanism (to stop the seconds hand), which ISA also refers to as a current breaker. Hacking the movement by pulling the crown out to time setting position will reduce battery drain when you’re not use your watch for a long period of time. Keep in mind that the battery can still leak and damage the movement, so it is a good idea to change the battery even if you don’t wear the watch often.

When changing the battery, you should see a green insulator film (see below) under the battery cell. Make sure this film is in place when you install the new battery. Its purpose is to prevent the battery from shorting.

Isa Caliber 336 Battery

Battery Number:

The battery you need for this watch is cell number SR626Sw aka 377/376. This is a small watch battery at 6.8mm in diameter, 2.6mm thick. 1.55V, 28mAh.

Low Battery Indicator:

When the battery is low on the ISA caliber 336 the second hand will skip a few seconds.

Accuracy Rating:

According to ISA, the claimed accuracy of the 336/168 is between -6 to +9 seconds per month. That breaks down to about -0.2 – +0.3 seconds per day. This is within normal operating temperatures of 0-50 degrees C.

Replacement Price

At the time of this post, replacements for the ISA caliber 336/168 were found online in the range of $23.40 to 24.95 USD.

Examples of watches with this movement:

This example of ISA caliber 336/168 was found in a 53mm Invicta Russian Diver model 7275. The movement has a small seconds hand at 6:00, but for this model Invicta turned the movement around so the crown is at 9:00 (lefty) and the seconds are at 12:00. It’s also interesting to see that the movement is engraved with INVICTA, which appears to have been done by ISA since it is in the same depth and style as the other markings. Near the Invicta label, it is also signed with “AT 1”, which could be a date code or related to a purchase order.

Isa Caliber 336 Invicta 7275 Russian Diver

Additional Resources:

You are reading Caliber Corner, the world's most popular resource for watch movement pics, specs, mods and DIY repairs. Follow @calibercorner on Twitter, Instagram but NOT Facebook. Subscribe on YouTube. Join our mission to spread movement awareness!

Join the discussion on ISA Caliber 336/168?

  • Keep comments respectful and follow our community guidelines.
  • Keep comments on the topic of ISA Caliber 336/168

For off topic or general watch questions, post in the Caliber Corner Forum.


newest most voted
Inline Feedbacks
View all comments
Franz Grünwald
Franz Grünwald
2 years ago

Please help me: How can I remove the stem from caliber ISA 336/168 … I can not find a push button. Can you give me any instruction?
Thank you!

Wibowo PR
Wibowo PR
2 years ago

some people mock the space inside Chinese-made watches with “cute” size movementscomment image

are there such people here to do the same with this Swiss made watch ?!

Boner Gong
Boner Gong
1 year ago
Reply to  Wibowo PR

Miyota is Japanese so I would definitely be complaining if my “Swiss” watch used this movement.

Seagull Caliber St19

Join our mission to spread movement awareness!

Members Online

  • pc1093

Recent Forum Posts

Trending Comments


Sellita Caliber SW200 VS SW200-1

Wow man, you should join the R0l3X club, they're desperately looking for new members, but…


Sellita Caliber SW200 VS SW200-1

Basically you are saying that one of the world's most used workhorse movements is complete…


Seiko Caliber 6N52

Thank you for sharing with the community.


Hangzhou Caliber 6460

One more update. I had a watchmaker regulate it 3 weeks ago. I wanted to…


ETA Caliber C07.XXX

I can confirm that the escape wheel from a standard 2824-2 movement is NOT interchangeable…


Would love your thoughts, please comment.x