Citizen 8100 Chronograph 67-9151 Restoration


One of my favorite Citizen chronographs is the 67-9151 model. I wrote before about a custom project based on this model HERE.

This time I will write about the all original one.

The watch was found in a bad shape, really scratched and dirty.  But even underneath that scratched crystal there could be easily observed the beautiful original green dial. For this model there are available only three dial variations, as seen in the catalog picture below.  The caseback was never removed in the past 30 years. The movement stopped a long time ago and the pushers were not moving.

citizen-67-9151

The restoration process started by removing the caseback and the dedicated bracelet. The design of the stainless steel bracelet fits the  octagonal watch case perfectly being made for this model only. After removing the bracelet and the clasp, it was time for the movement to come out.

The calibre 8110A was serviced and now it is running strongly, as it should. It is a flyback mechanism and features a day – date complication too. It is an automatic movement,  with 23 jewls and hand winding capability. It was produced by Citizen starting from 1972. It is a vertical clutch chronograph (beating at 28.800 bph) with column wheel and fly back function. The fly back function means that you can reset the chronograph while in motion and it will start again without needing to go the entire process of pressing stop-reset-start. So, one push can do all of this. A particularity for this movement is that when you want to change the day you should pull the crown to second position (for changing the date) and push and release the reset (1 o’clock) button.  The column wheel/vertical clutch design of the movement advices to leave the chronograph running for most of the time (this way you can also see the beautiful sweeping central second hand in movement), but from time to time it should be stopped.

citizen 67-9151 chrono

The dial is the main attraction of the watch, and that says something about it. The overall sharp, angular shape of the watch is mirrored in the mesmerising details. The green color is not plain at all but lighter and shinier in the centre and darker at the 3 and 9 sides. The chronograph sub-dials are hexagonal with 3 variations: yellow-white, yellow-orange and all yellow.  The seconds hand for the all yellow version is yellow too while for the other two is orange.

vintage citizen chronograph 8110

At the end of the restoration we have a newly brushed/polished strap and case, fully functional movement, and a new mineral crystal. What a beautiful watch!

Read more about Citizen chronographs on this page:

https://vintagecitizenwatches.com/chronograph-vcw/

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4 thoughts on “Citizen 8100 Chronograph 67-9151 Restoration

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