One of the Citizen mysteries, for me, gravitated around this very model. It is not only a very elusive watch but a beautiful one too! I have seen a few pictures that made the dial look bright green and in others looked a little bit towards golden brown. So I had to have them both to see myself how they look in real life!

Finally I found two, both in excellent condition. So, here came out the magnifying glass, the photo camera and I kept on looking at one and then to the other in all lighting condition and from all the angles. In the end the conclusion is:

• same case: 6N-4W-S, case back, pushers and crown
• same model no: 4-901096-K
• same movement: Citizen cal 8110A
• same date and day wheel (English – Japanese)
• same dial code: JAPAN 8110 – 901166 KA
• same dial color – green, BUT… different shades of green

In fact most of the times they look almost the same, but from time to time, they look like in the picture above. So… why this difference? I do not know for sure. Based on the serial no, both these watches were made in the same day or very close together because they are only about 60 watches apart. My opinion this far is that the paint used had a slightly different proportion of ingredients. The simplest explanation is most of the times the correct one. If any of you guys have another point of view regarding this, please let me know! Maybe sun exposure, patina or…?? One day we might find out.

Update 2017 September: A NOS full package watch, box and booklet. The strap is the original Citizen rubber one. The price at the time was 23,000 JPY. (pictures from the online seller)

Meanwhile… read more about vintage Citizen bull head chronographs HERE.