Citizen Challenge Golf 7760-770901K BLS

Finding a NOS watch or a mint one, (new old stock – one that was never worn) is not an easy task when talking about vintage watches. Finding one dating more than 40 years ago is even harder. But finding one that has its original box is pure luck. Add the fact that it has not only the hinged box but the outer cardboard cover too, and it is a rare model, and you have now the full picture of this extraordinary package. This in the Citizen Challenge Golf 7760-770901K BLS . During 70's Citizen was developing a wide range of watches and because golf was a not to miss opportunity, one watch dedicated to this sport was released by the manufacture. Read about more sport related Citizen watches HERE . This particular model came in two case styles, a round one and the one I am presenting here, a TV style one. Usually I see them on leather straps (in fact this is the only one I saw on a bracelet). So a TV coated case, with a beautifully polished / brushed stainless steel ? bezel on a matching coated bracelet. The bracelet is very light and might be aluminum. The coating is not black, but a dark army green. The acrylic crystal is flat and on the underside surface, at 12 o'clock, it has a magnifier for better visualisation of the golf score window. The casebak is made in stainless steel and is engraved 7760-770901K BLS, water resistant, Citizen, and the serial dating it to March 1973. The outer part of clasp is coated, as well as the clasp extension, while the folding part is polished and engraved: Citizen watch Co Japan, base metal tops, stainless steel back. The movement is the Citizen calibre 7760, developed specially for this model. It is a nicely constructed one, automatic, with hand winding capability also. It has 26 jewels, it hacks and has a date that can be changed only by moving the hour hand (not quick set). The window at 12 o'clock is for keeping the score. Pushing the crown advances the score is the watch is held vertically and goes the other way around if the watch is held up side down while the crown is pushed. I don't know much about golf but the watch has these numerals on this score wheel: on blue, from 0 to 18 and then prior of 0 we have on red 1 and 2. The dial is blue in bright light but green in normal light. It is darker on the sides and brighter in the center. The hands, the applied logo, window frames and hour markers are polished.
Update:
Here is another completely different model, round case with original white strap. (pictures from online seller) Beautiful interesting watch with a great dial too look at but a difficult one to photograph right. So… I will keep on trying until I have the perfect picture!vedere di piu copia rolex e Breitling Chronospace