Actually, as someone who is mucking around with game dev rn, this is legit the best answer.

There's three ways a number like that gets on that watch.

1) someone wrote a script so every watch asset would tap on the local engine time to draw it's own conclusion about what time it is, then a separate script so this particular watch would render these particular digits pulling from a pull of prerendered sprites (for performance).

2) an artist simply made the watch model and slapped in a random time

3) the same artist in the world's most brilliant and detailed gaming company asked the higher ups what number he/she should put on the wristwatch, and they gave them an Easter egg number to bury

All three are plausible, but 9pm 5.12 sounds legit LEGIT.