Nice. Always good to get a gift that's interesting and unique. I assume you've pulled out the drafting pencils to draw some expensive jewellery for the wife's next birthday ?
The OM cameras were such a great piece of design. Curious that the shutter speed dial on the lens mount wasn't more widely adopted - seemed to be quite an intuitive place for it, so you could set aperture and s/s and focus with the one hand. Also intersting that these 'full frame' SLRs are the same size as my APS-C Fuji X-E2 which is considered small these days.
My first camera was an OM-10 (which coincidentally I used today - although it took around six months to shoot a roll of 24).
Cheers.