Before you go to re-roll 120 onto 620 spools, a process I found quite tedious, try trimming the edges of the 120 plastic spools modern film comes on. If you clip it down with something like nail clippers or an X-acto blade, some (most?) cameras will take it.

Looking it up on Camerapedia, it seems it was made in the 60s and was also branded as the official Cub Scout camera.