Quote: I think your concept of a "reissue" camera is a false one. OM2s were manufactured for many years and all were original.
But there was an "original" model and a revised version - OM2n - I think the main difference was in the flash circuitry, something to do with OTF flash exposure control with the T20 & T32 flash guns. OM1 (as opposed to OM1n) is reasonably common but I get the impression that the vast majority of OM2s are the N model.
Speaking of flash, does the camera still have its (detachable) hot shoe adapter? If so, are there cracks at the corners of the aperture at the back where the fixing screw is operated? Most OM1 & 2 cameras have lost their hot shoe adapters, and almost all of the existing ones are cracked to some extent, as a result of overtightening. They almost always still work, though.