Sticking with Citizen’s Jet automatics today – although the photo is not new, it’s on the right date 🙂  The 39 jewelled version of the Jet is the ‘super’ calibre, with more adjustment for accuracy done at the factory. Using the 1160 movement, with ‘Easy Change’ date mechanism, this one is gold filled to a thickness of 100 microns. Typically gold plating would have been 20 microns for an average watch of that period. Production date is December 1963 – it runs very well and it just feels and looks like a quality piece on the wrist:

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More info on this one here: https://sweep-hand.org/2013/02/14/this-weeks-featured-watch-the-super-jet-autodater-39-jewels/