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
DBC32-1A | Black Data Bank Watch | CASIO
CASIO DBC-32 Multi Lingual Data Bank Calculator Vintage Digital Wristwatch AHE92 | eBay
CASIO DBC-32-1AES (Module 2888) Review and Unboxing - The modern Calculator Watch, is it any good? - YouTube
STL file Nato Strap Adapter for Casio DBC32 to Nato 24mm・3D printing design to download・Cults