I have been sitting back waiting for these Astron Solar GPS watches to get practical (ie wearable on a 7 1/4 inch wrist)
40-42mm is about my size.
The new Astron Solar GPS with the 5X movement is the smallest GPS watch ever made (according to Seiko) comes in at 42.9mm x 12.2mm
Though unsync'd the movement is only +/- 15 sec a month? Would you all consider with GPS sync it is more of an HAQ?
Apparently the movement syncs automatically each day it first sees daylight and then once more each day at a user selected interval.
Radio Atomic Sync is impractical for me as I don't live anywhere near a tower.
How accurate to atomic time is GPS sync?