Nintendo Super Mario Bros 3 LCD Game Watch (1990)
Fully working. Looks like the score maxes out at 1999.
I wore this watch to school in elementary school, and the teacher instantly took it as soon as I walked into class. Then I played it so much that I wore the battery down, and eventually let water get into it and totally ruined it. 😓
@SecretaryOfHate Shame its gone. At least it got a lot of use.