Saturday, 30 August 2014

Citizen Crystron 7100

Today's watch is an example of the quartz dial version of a watch line I've only blogged an LCD watch from before.

In the early 1970s, Citizen Watch Co. released a line of quartz watches under the Crystron name. I guess that the name came from them containing a quartz Crystal and being elecTronic.

The watches came in a range of designs with several different movements being used in the range. This one is a 3 hand dial design with both a day and a date marker at the 3 o'clock position. It has a white dial with markers and not numbers, and has the Citizen CQ symbol on the bottom of the dial.

Based on the number on the front, it suggests a  model 7100 module, although on the module itself it has 7300C, 280-18, and TW02. From these the 7100 and 7300C fit the Citizen numbering convention, but I can't be sure which (although my guess would be 7300). The serial number would indicate a 1979 date, but it may possibly be 1969. The model number is either 7100-711685 or 4-730771 with the old Citizens having numbers in both styles.


  1. Very nice Citizen Crystron, Still rare and hard to find watch. Nice blog!

  2. I have one with the same module, well at least the is what it says on the dial but mine is squarish instead of round,

  3. Hello
    I have Citizen Crystron
    I don't know how much is one
    Do you have any idea what is the price for it?

  4. I'm looking for a 7300c movement for a Citizen crystron to repair my late brother's watch. Any advice where to find one?

  5. First quartz watch came to market in december of 1969 and that was Seiko Astron, which cost which US$1,250 ($8,362 in today's value) and that Citizen is just generic mid-prize watch, so no way it could be from that time.