I wear my watches all the time and change models only if I needed better water resistance, maybe the wrong idea but they weren’t bought to be baby’d.
Another 'disconnected' Modular 45 combo today: titanium Carrera Calibre 5 mechanical module on titanium lugs and buckle, and grey calfskin strap #connectedtoeternity
I googled Seiko diver 4R15-00D0 and got this; https://www.google.com/amp/s/yeomanseiko.com/2009/08/29/seiko-4r15-diver-srp043k2/amp/
My bad… I misread the “R” for something else. Apparently then no nickname for that one - other than being “THE” (first) 4R15 using Seiko diver… End of OT from my side. Sorry…