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Seiko caliber VK63 SII

Hattori SII Caliber VK63

Seiko caliber VK63 SII

Manufacturer Hattori aka Seiko Instruments Inc. (SII)
Caliber Number VK63, VK63A
Type Quartz (mecaquartz)
Diameter 13 1/2”’ (30.80mm x 29.10mm)
Casing Diameter
29.10mm
Height 5.10mm
Battery Cell Number 394
Frequency Unknown (please comment below)
Quartz Type Tuning fork type quartz crystal
Stem 351177/tap 10 or 351892/tap 11
Hand Sizes 1.50/.90/.32mm
Jewels 0
Functions Hours, minutes, small seconds, date, central chronograph seconds, 60 minute counter, 24 hour indicator
Country of Manufacture Japan (assembled)
Known Models Mercer Brigadier, Seiko SSB025, Autodromo

The Seiko SII caliber VK63 is part of the hybrid mechanical quartz (mecaquartz) movement line. It is a chronograph movement that uses quartz technology for the main functions of the watch, and a mechanical module for operating the chronograph. Learn more here.

Time Module/Seiko states that the expected accuracy of this movement is less than +/- 20 seconds per month at normal temps. The battery life is about 3 years with normal operation.

Battery replacement:

After installing a fresh battery cell, remember to reset the circuit by touching the AC terminal of the circuit block (look for an arrow labeled AC pointing to a hole) and the switch spring with your tweezers.

Please allow us to interrupt your gear turning and caliber learning to say thank you. Thank you for being here! Now, back to the movement..

Replacement prices of about $35.95 found online.

The Seiko labeled caliber number for the VK63 is 6T63. You might find this caliber VK63 listed as being produced by SII aka Hattori aka TMI (Time Module Inc) aka Seiko Instruments Inc. Learn more about the different names here. Other calibers with the same base movement are VK67 and VK83.

The front of the movement

Is the Hattori SII Caliber VK63 any good? Share your opinions, experiences and watches below... Keep comments respectful and follow our community guidelines.

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What is a Meca-Quartz Movement? Watch Movement | CaliberCorner.com

[…] Seiko SII VK63 […]

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[…] apparently, unless the Seiko VK61 is notably better than the VK63 that's showing on CaliberCorner.Hattori SII Caliber VK63 Watch Movement | CaliberCorner.com And it is also said, "go not to the Elves for counsel, for they will say no and yes." — […]

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[…] Learn more about the different names here. Other calibers with the same base movement are VK61, VK63, VK67, VK68, VK73, and […]

norman duddy
norman duddy

i have the pulsar pu2011 model using the VK64-x001 caliber but cannot find the stem if
anyone can help..
ive tried a few uk suppliers and ebay but no luck so wondering if its been modified with a new number

norman duddy
norman duddy

First time on here so hoping to join in with exisitng members.
I am always interested in meeting other watch makers to pass on info tips experience ect..
I deal in sales repairs of a few makes mainly omega tag seiko/+ cartier

Cheers norman United Kingdom

D.V.
D.V.

If this is equivalent to 6T3 (like in SSB025) than according to the manual the frequency of crystal oscilator is 32,768Hz,

Scott Taylor-Harvey
Scott Taylor-Harvey

True or false. I bought a Pagani Designs “Daytona” homage that uses the VK64 movement. The supplied hands are very hard to see against the white dial and I would love to change them out. Seems that the hour and minute hands are pretty standard Seiko fare, but the sweeper is not. Anyone know of a source for these as I am told that once the sweep second hand is removed, it cannot be reused. Is this true, and if so, what now?

Scott Taylor-Harvey
Scott Taylor-Harvey

My bad, it uses the VK63 movement

Jack Ford
Jack Ford

I have the same watch and I’m looking for the same black hand set for the same reason. Please advise if you have any luck.

Freedman
Freedman

Removing the sweeping second hand cannot be reused on many chronographs because it’s so tight to be able to handle the motion from swinging back to zero Removing and replacing can widen the hole. I haven’t heard it with the VKs but you can always try to by a cheap replacement and play with it to test. This is a good idea to do first before working on your watch. You’ll need a 0.32mm hand to test. Another option is that you can carefully paint the hands with model paint. I did this before successfully. Let me know what you… Read more »

Leon O'King
Leon O'King

Ive had success painting hands before, great idea, just don’t overdo it or you could see textured streaks. Hobby paint aka model car paint is what I used.

Jack Ford
Jack Ford

Can you explain the painting process in more detail? Thanks