Seiko SBQJ015 perpetual calendar with 8F56 movement (READ DESCRIPTION) - YouTube
Seiko Perpetual Calendar GMT Titanium 8F56-0080
8F56-0050] 1998 Perpetual Calendar -- bezel not rotating, battery needs replacement, needs overhaul in general -- but hey it's an interesting piece (and still works)! : r/Seiko
Seiko Gmt Perpetual Calendar 8f56-0029 - Pre-Owned Mens Watches