Tag Archives: Cosmotron

This Week’s Featured Watch #64 – Cosmotron X8 4-480040

Posted on November 23, 2014 by sweephand

I’ve been looking out for the date version of the 0840 Cosmotron since I hadn’t previously found an example – designated the 4840, models with this movement were launched in 1970 and run at 21,600 beats per hour. Since my … Continue reading →

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Latest Arrival – Cosmotron 7800

Posted on May 27, 2014 by sweephand

I have a soft spot for the Cosmotrons – these were electro-mechanical hybrid watches with a limited production life since their new technology was almost immediately superseded by quartz technology. The fact that they were doomed almost from day one … Continue reading →

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This Week’s Featured Watch #57: Cosmotron GX (green dial)

Posted on March 19, 2014 by sweephand

I’ve featured a Cosmotron GX before – Number 33 in the series – but I have a second example. This one grabbed my attention since it has an unusual dial, featuring a textured green finish and contrasting white chapter ring: … Continue reading →

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What Makes This Cosmotron Special?

Posted on January 23, 2014 by sweephand

There are a number of things that can make a watch ‘special’ – it may be an expensive high grade piece, or it might be a rare vintage model; it may have been a ‘world first’, or it may have … Continue reading →

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Cosmotron 7803A Movement – the Special Version

Posted on November 28, 2013 by sweephand

The X8 / Cosmotron electro-mechanical movements  first produced in 1966 were, for a short time, Citizen’s most accurate watches – capable of reaching chronometer grade standards.  They had a very limited life though, since quartz technology was developed soon after … Continue reading →

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Additions to the X8 Cosmotron Page

Posted on February 5, 2013 by sweephand

For the technically minded I’ve now included scans of exploded views of the two types of movement (08 & 78).

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X8 Cosmotron Page Update

Posted on February 5, 2013 by sweephand

I’ve just added a bit more information in the 78 series section on the Cosmotron Special. This describes the function of the button at 8 o’clock found on these models, with a link to a video showing it in action. … Continue reading →

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This Week’s Featured Watch #33 – The Cosmotron GX

Posted on May 21, 2012 by sweephand

In 1969 Citizen’s electro-mechanical watches, introduced in 1966, became known as ‘Cosmotrons’. The technology in these combined new printed circuitry and a battery with a relatively conventional balance and hairspring. But one Cosmotron was an exception to this convention – … Continue reading →

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Cosmotron Battery Life

Posted on February 10, 2012 by sweephand

Battery life for Citizen’s electro-mechanical watches was advertised as 12 month. I have run one of mine constantly to see what period of time I would get. Here’s the watch, from 1975: It had a new battery fitted by the … Continue reading →

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This Week’s Featured Watch #18 – Cosmotron 7806

Posted on December 29, 2011 by sweephand

This was my first Cosmotron, and was almost a ‘just curious’ buy. But as soon as I received it I was rather hooked and I have bought a few more since. I’ll be doing an article on the Cosmotrons in … Continue reading →

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