@Halley, nice work, i am have at the moment three vintage daytona projects going on simultaniously, thats why i am asking. I am too gathering parts, crowns, crystals, pushers, tubes, bracelets, dials, movements, bridges and so on...
BTW, where do you find these engraved casebacks? are they gen or aftermarket? What do you do about the space between the lugs where there are no engravings? Can you have the missing numbers engraved?