I was taking images for a
Godzilla vs. Gigan film still gallery today, when I noticed this pointless little bit of trivia, and figured I'd post it here.
When Gengo shows Machiko and Shosaku the key to the pay locker he put the tape in, it has a white plastic key tab with neatly-printed numbering on it:
But when he goes to the locker and unlocks it with the key, it has a different tab with sloppily-etched Sharpie ink numbers: