The spazz in me wants to know if it was a Canon F1.
I'm betting on Nikon.
It all boils down to if DD is a Canon or a Nikon man. Me, I would have killed for a Canon F1, once upon a time. It was always out of my price range.
Call me a turncoat, but when the electronic age happened, I followed the leader, which was clearly Nikon back in the day.
I still own a collection of perfectly functional cameras, including Canon F1 (my favorite mace - have owned three), Canon FTb, Nikon F, Nikon FM, Nikon F2, Nikon FM2, Nikon F4s (Nikon's first successful auto-focus format - I also own a nice 80mm-200mm f=2.8 lens for this camera system, along a few others.
Along with a number of FM2s - all mechanical, completely indestructible - and a few more F4s (advanced for their time, trouble-free, unlike most Canons of that era) this made up my complement of 35mm professional photographic warchest items.
Obviously, most of the portrait work I did was done on a medium format system of one sort or another, depending upon the subject matter. I also owned Bronica 645s, Mamiys 6x7 RBs, Mamiya Twin Lens 6x6, Fuji 6x17 range finder panoramic, Hasselblad 6x6.
Honestly, as cool as the Hasselblad was, the only use I ever found for it, being a square format and all, was for weddings where they expected a square format wedding album and I HATED doing weddings.
Generally, going on a nature excursion, I would hang a 35mm around my neck, mount either a Mamiya RB 6x7 or Fuji 6x17 on a tripod and just head out. I had a quick release on the tripod, so if I needed to switch from medium format to 35mm, I could do so in less time than it takes to steady the legs of the tripod.
... but, yeah. I still have decent condition Canon F1 (which I still own) AND Nikon F (which I still own) models, just like were popular in the 60s era.
I managed to get rid of all of my professional medium format gear as the digital wavefront hit the pro market, around the turn of the century. By 2003, I had only one Mamiya 6x7RB (which I still own), one Nikon F4s, (which I still own), one Mamiya Twin Lens (which I still own), one Graflex 4x5 large format (which I still own), a few assorted lenses which fit various of my cameras, but that is it.
As it might be though, I own more lenses for the large format, which was my least used camera, than all the other classics combined. Things like four awesome Schneiders, three ancient Rodenstock, seven kind of cool Kodak, two really nice, modernish Nikkor and a creepy ultra wide angle Wisner lenses for my 4x5 camera, which I mainly used for creating graphics using lithe film.
(taking pictures of text to add names to a pic of US Army soldiers, for instance.)
The only modern camera I own now, could hardly be considered as a professional model. It is a Nikon D5500 and I have a standard, dark 18-85mm lens and a faster 80- 200mm f=2.8 lens as an accessory.
I doubt that it would double as a decent mace, as any old Canon with a nylon strap would. Just sayin'