IBM Model M5-2An IBM Model M5-2 with a cute little trackball. Posted by opalinemoth.
Using Shark's fool-proof IBM part number finder even I could figure out what model this might be:
According to the database, all models with these part numbers were manufactured by Lexmark, starting in 1993/1995.
Published on Mon 30th Aug 2021. Featured in KBD #41 (source).