Manufacturer Grand Seiko (Seiko Watch Corporation) Caliber Number 9R31, 9R31A Movement Type Spring Drive, manual-wind In-House? Yes Jewels 30 Frequency...
SBGY002
Latest
Part of the 
network of watch sites
network of watch sites network of watch sites
RE: Which quartz movement is better
The best quartz movements are Seiko and Miyota for reli...
swissetasuperclone , 2 days ago
Did you take the back of the watch off? Any pictures of...
Timepiece , 4 days ago
Anyone know the marketplace for these type of movements...
James16A , 4 days ago
Recent Comments
My Swiss Military Hanowa Black Marlin diver's watch has this movement. Very accurate, upto +-2…
My Swiss Military Hanowa Dark Knight has this same movement. Accuracy is comparable to the…
Newer L899 calibres have a power reserve of 72h according to Longines
would it be a chance the cal 0950 is a downgrade version from Cal 0910?
Out of box 1ms Beat Error. +1 sec a day. Can't beat that.
Where can i order this cal eta 988.333?
To me exciting would be if they add Si2 escapement components (balance wheel, balance spring…