Very hard to locate but I managed to find one!l. Not sure about the hands and lume; perhaps a hands service replacement. Lume is removed. Crown is replacement. Case is sharp; sea monster sharp too. All important movement number 26553287 is at the beginning of the acceptable range. Raised emblem, 321 movement and DON bezel indicate that this watch is not a transitional; the 145.012-68 is fairly indentical to it's well known older brother from 1967. The only difference (if you accept that later 145.012-67 had a flat chrono hand) is the all important, and hard to find, 145.012-68 caseback. May not be perfect but these are hard to come by. Opinions?
Congrats! I have one too! The last of the 321's. My serial # is 237 in front of your's . The hands are correct but look to be replacements. Enjoy!
Welcome to the club! I would think that it would have been one of the shortest production runs of any of the 321's.
