Great Japan Watch Company


Here it is a very special watch. It is one real piece of history and I will let you know why. 🙂 It is a small watch, one of the first wristwatches made by Citizen. It is in amazing shape for its age. You can read about a similar piece HERE.

citizen vintage watch

With the help of my online Japanese speaking friends so far I have this:

“During the war roman letters on domestic was outlawed so Citizen adopted the Japanese name. Dai Nihon tokei kabushiki kaishya 1938. In 1948 they were able to change the name back to “Citizen””

“大日本時計株式会社 (it means Great Japan watch company)” was an old name of CITIZEN in 1938-1948.”

“In those days, Japanese government commanded CITIZEN to change company name. So, this watch is very rare.”

Well… now we know. Do we really need more words on this amazing piece? Maybe not, but if you have more info on this, please let me know in the comments below.

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Citizen Super Jet Auto Dater X case


Super Jet! Wow again! And a “X” case?! Super! 

Some say the best period of Citizen was around 1969, some say it was earlier and others believe it was after 1970. Well.. 1969 was at least an interesting year because Citizen had a lot of cool features intersecting around this time frame. The watch I will present to you today was made in June 1968. So… let’s see it!

citizen super jet auto dater 1

This particular time piece is loaded with a lot of cool features. It is the Citizen Super Jet Auto Dater, model SADS51202-Y. It has a polished/brushed stainless steel case, marked with a circled X. That means the case is unibody and it has no removable case back. In fact the movement comes out only if the crystal is removed. I also love the fact that it is marked “Parawater” (not the common “water resistant” or “water proof”). This was a therm that only Citizen used in order to show that the watch is in fact water resistant, and this one was up to 150m. Not having a removable case back eliminated a week link into this water resistance issue. You can read about the first Japanese water resistant watc, the famous Parawater, HERE. The mineral crystal is domed, with a concave inner surface. The dial is matte black, with a somehow satinated appearance. It is marker with 3 stars, an indication to the awesome movement inside. The luminos hour markers (the hour and minute hands have luminous parts too), have a polished trapezoidal shape making time reading very easy to do. The date is positioned at 3 o clock, where the unsigned winding crown is located too. By the way, the crown is manually winding the automatic movement, sets the date while the date changes only by moving the hour hand back and forward midnight.  I was so wrong! How come I missed the fact that the date changes by pulling the crown?! Just pull the crown in the second position and the date jumps! Pull again, it jumps again! 🙂

citizen super jet auto dater 2

Let’s open it up! Let’s not forget the X marked case, with integrated case back!  The first thing one have to do is to remove the bezel (this is also keeping the crystal into place). Use the right knife blade to pop it open. Then remove the crystal. I do that using a suction cup. On the lateral part of the crystal there is a black rubber seal and underneath the crystal there is a transparent one in order to facilitate water resistance. So, the crystal is out, and so are the seals. Now turn the watch dial side down and slowly turn the crown. The movement will fall, so pay attention. Now that we have the movement out, turn it so we can see it. The beautiful Jet movement, gold plated, 39 Jewels, three stats, in all its glory! Love it! Read more about Jet movements HEREReassembly is somehow similar. A special attention should be payed when pacing the crown back. Press it into place only when in the right position into the movement, otherwise the stem can break. When pressure fitting the bezel back into place, be careful not to break the crystal. Nor the stem or the crystal are available for sale anywhere. So… take your time or take it to a watchmaker. 😉

citizen super jet auto dater 3

Anything else? Well.. not only that is in almost perfect condition but I can introduce to you how the original box should have been. Most of the times the box alone can double the value of the watch if it can be sourced. So… this is how a Super Jet auto dater box should look like. (I hope I can get it soon to complete the package, and the original strap too – not sure what is the right model here-)

If you want to see the 150m diver version of this watch, one of my all time favorite pieces, click HERE

I hope you enjoyed the article and found the info about the X case watches useful. Now, lets get them opened! 🙂 These movements need to be seen! Click on the images to magnify them if you need more details.