I am preparing to sell some old Nikkor stainless steel tanks and reels, but I have one reel that I've never used and can't identify. I inherited it from my dad, who used it in the 1940s. It's three-inches high with an interior dimension of 67 cm or a hair over 2-5/8 inches. I poked around on Google and could find no reference to a roll film of this size. I doubt if I'm going to get any takers for this particular reel, but I would at least like to know how to describe it. Does anyone have a clue?