Hands-On: Yes, You Can Still Buy A Casio Calculator Watch - Hodinkee
CA-53W and DBC-62 differences? I can't seem to find the latter in black, so I thought I'd go with the former which doesn't have the same sentimental value, but is cheap and
Casio Module No. 676 DBC-62 | WatchCrunch
Casio Databank - Wikipedia
Casio CA-951 Calculator Multi Alarm Vintage Men's Watch | eBay