The IR remotes I have for film and digital cameras are Minolta ones ( and a Sony digital )
While the film ones control several models of camera , as do the digital triggers , non if them do both film and digital models .
Likewise they did several triggers for film bodies that worked only on specific models .
I think the reason for having more than one trigger was simply to avoid having one that would set off several ( other people's ) cameras at the same time and place .
The Olympus one has a zoom control on it and a +/- one on it .
Does the one for the film camera also have these controls ?
If not it's likely to use a different frequency/code .