Una foto del movimiento, por cierto precioso...
Algunos datos de interes:
"...This is a very early Seiko quartz movement...a 3863A from 1973. I believe the 38-series was the direct successor to the revolutionary 35-series Astron (the world's FIRST quartz watch) which Seiko introduced in late 1969. The crystal in these only oscillates at 16,384hz...half of that of a modern quartz watch. If I do not miss my guess, the quartz crystal is encased in that relatively huge silver cylinder at the bottom of the pic.
According to an original instruction booklet I have, the caliber 3823 was referred to by Seiko as a "V.F.A."., and was rated to an incredible 5 seconds a month! A minute a year accuracy would be impressive for TODAY'S quartz watches...must have been a real mind-blower in the early '70s. Not sure what the 3863 did in terms of accuracy when new (as it is unadjusted), but I am sure it was pretty impressive. I doubt very much that this one was cheap, either. Probably didn't cost as much as a car like the Astron, but I am sure it was pricey. For a quartz watch, it sure has a pretty movement."
Fuente: SCWF Mirror