cazalea[Seiko Moderator]
20968
The 6899 Skeletonized Seiko Movement
I bought this watch to go with my platinum ring. Full Stop.

Then I began to appreciate what I had found! The decoration is very nice.

Skeletonizing is extreme. The movement is quite small too.
Seikoβs 68XX family of thin hand-winding movements initially began in 1969. The movement runs at 21,600 bph with about 37 hours of autonomy, and -15/+25 seconds per day (in)accuracy.
Cazalea