Today’s watch is a very rare piece – I have seen just one other. It’s a special version of a Jet 27 jewel automatic, with an applied ‘777’ logo and a water resistance rating of 40m. That’s achieved by the use of a one piece case. The use of an applied ‘Autodater’ logo above the printed ‘Citizen’ name is also very unusual, whilst the dial also includes ‘DMC’ printed below the depth rating. The case back is unique to this model I think – featuring a kneeling archer. I have previously done a more detailed post about this piece in my ‘Featured Watches’ series,: https://sweep-hand.org/2016/06/10/this-weeks-featured-watch-76-jet-autodater-777/ and another that covers how I managed to get it running – although it is in great condition it was sold as a non-runner, so I got it for a very reasonable price. I am not a watchmaker, but I did have success with this one!: https://sweep-hand.org/2016/06/12/more-about-the-777-autodater/
The other example of this that I have seen so far, has gold tone markers and hands and gold plated bezel and crown. Here’s a closer look at mine: