I finished what I thought was a 36 exposure roll of film earlier, but once I got it out of the camera I realised it was only a 24 exposure roll. I am using an old Ricoh XR2 camera which has manual film advance so it didn't automatically wind back; it also didn't protest when I wound it past 24.
The film seemed to wind back into the canister without a problem. Will the film be damaged or ruined in any way, or will the last frame just be massively overexposed from having 12 shots exposed on it?