Citizen Cosmotron GX – SOLD

I’m offering one of my Cosmotron GX’s for sale – head only. This one, case number 4-370601, has a textured green dial with white chapter ring. The dial and crystal are in good condition, and it has a Kanji only day wheel :

SONY DSC

Although the GX is a ‘Cosmotron’ it is in fact a tuning fork movement – a ‘hummer’ – rather than an electro-mechanical hybrid. These were not made for very long, and this one dates from October 1975:

SONY DSC

The 11 jewel 3701B movement is Citizen’s own design (so, unlike the 3701A, is not marked ‘LIC. BULOVA’ ) although it is of course very similar to Bulova’s single coil 219. The watch is in good working order, keeping accurate time and the date and day set correctly. The day is not quick-set, so it’s advanced by turning past midnight when the crown is out one step, which also ‘hacks’ the movement. The date is advanced with the crown fully in, in the normal running position.

The movement stops properly when the crown is pulled right out, which switches it off and conserves battery power when not in regular use.

The case is in decent condition with some light scratches and marks, but no major dings. Case diameter is about 38mm, with 18mm lugs (despite the 20mm strap shown in some of my pics!) – here are more images of the watch from my ‘Featured Watches’ series of posts:

https://sweep-hand.org/2014/03/19/this-weeks-featured-watch-57-cosmotron-gx-green-dial/

Price is GBP135 (USD190), which, to make it simple, includes shipping. Payment to be via PayPal only.  I am in the UK and shipping will be via Special Next Day Delivery within the UK, or International Tracked (& Signed if service is available) so please check that tracking is available in your country here first:

https://www.royalmail.com/personal/international-delivery/international-tracked-signed/coverage

Please contact me via the ‘Got a Question’ Contact Form – see top of the right-hand panel on the home page. Thanks.

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2 Responses to Citizen Cosmotron GX – SOLD

  1. SANDOR CSERESZNYES says:

    IT IS SEEMS TO BE AN EXCELLENT CONDITION WHAT IS THE ACCURACY OF THIS MOVEMENT OTHERWISE THE11 JEWELS MOVEMENT IS LOOKING SO STAUT ROBUST.

    • sweephand says:

      Hi Sandor – thanks for visiting my blog. If you are asking about his particular watch, I’m afraid I haven’t measure the accuracy exactly, but from observation it is keeping very good time. In general terms I believe that the Hisonic and the GX movements were good for +/-60 seconds per month originally, as Bulova guaranteed for their 218 and 219 calibres. Stephen

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