Microprinter
A Citizen CBM 1000 thermal till receipt printer connected (via RS-232) to the PC. The thermal paper must be 20 years old at least; it's from a junk-box and was probably intended for use with HP calculator printers. It has blue thermal ink instead of the more usual black, and is 57mm wide. The printer can accept either 57mm or 80mm paper rolls.
UPDATE: I now have some end-of-roll paper that I got from FreeCycle; it's 80mm wide and prints black, so I'll do some more tests and photos.
Microprinter
A Citizen CBM 1000 thermal till receipt printer connected (via RS-232) to the PC. The thermal paper must be 20 years old at least; it's from a junk-box and was probably intended for use with HP calculator printers. It has blue thermal ink instead of the more usual black, and is 57mm wide. The printer can accept either 57mm or 80mm paper rolls.
UPDATE: I now have some end-of-roll paper that I got from FreeCycle; it's 80mm wide and prints black, so I'll do some more tests and photos.