Black and White Pair

Well, black and silver really :) These two Cosmotrons use the 4840 electro-mechanical movement. They are the same model, but the dials have differences – the black one from 1971 is marked ‘transistorized’ whilst the silver one from 1970 is marked ‘electronic’. And the fill colour of the Cosmotron logo is different – there is also a blue dialled version with green. The hour and minute hands are a frame design, i.e. see through centres, and the contrast of the bright orange second hand is a great highlight:

A great pair imho :)

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Latest Addition to the Speedy Restoration Page

Another Speedy (67-9313) is now added to the restoration page :)  This is is a white dialled version…..

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New Restorations Page Updated

Following publication of Brian’s restoration of Mikko’s very nice Custom V2, we noticed some interesting things about the case number on his and other examples. So I’ve now added a note to the article, which explains what our little bit of research uncovered…..

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New Restorations Page Published

A bit later than I’d planned, but the new restorations page – ‘Restorations by Brian, aka 31 Jewels’-  is now uploaded.

Since there will be more restoration work to be added to the blog, undertaken by master watch maker Brian, this is Page 1, and features Mikko’s interesting and rare diver style Custom V2. There’s another of Mikko’s watches to be added to the page in the future, so we can call it ‘Mikko’s Page’ :) :

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New Restoration Stories on the Way

Restoration of the 8110A chronograph, in the form of the 67-9313 ‘Speedy’, by Brian (31 Jewels) is featured on a special page –  –  and his stunning work on my 1958 Auto is also shown here:

I think it’s great to see this kind of thing, so I am pleased to say that there’s more on the way :)  Initially Brian’s work on a Custom V2, an Alarm Date and, later, high beat Leopards will be featured.

Watch this space! :)

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What’s on the Wrist of an Airline Pilot in 1964?

….. a Super Jet of course! :)

This is an ad from 1964, showing a very nice, and now very rare, black dialled Super Jet with lumed hands and rated to 150m.

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This Week’s Featured Watch #69 – Chrono Master Chronometer Auto Day Date

The original automatic Chrono Masters were Citizen’s high end models in the 52 family of movements, which included the relatively well known Crystal Seven range. Several levels of accuracy were incorporated into the Chrono Master line-up – the standard model, the Chronometer, the Special and the Superior Chronometer Special. They also produced hand winding models, and one electro-mechanical (‘X8′) version – for comprehensive information on all the range see this page:

My example is the Chronometer Auto Day Date, with the 33 jewel 5240 movement, and was made in May 1969:

The movement hacks, and the crown is in the hacking position in the above image. Not all of the Chrono Masters came on steel bracelets, but this one did and has 20mm lugs. I’m not convinced that the bracelet is original – catalog pics show a mesh design – and the end links are not a snug fit, so I replaced it with black leather, which was also the original retail option for Chrono Masters:

The eagle motif used exclusively on the dial of the Chrono Masters is repeated in the form of a gold medallion on the back – the wear on this one helped keep the price to an affordable (for me) level!:

The case number is 4-520840 – these can also be found with earlier style number of ACSS2929. The case is in good condition, with no dings, just some light scratches. The crown is signed with the older style ‘C’ mark, which I think was used on all the Chrono Masters:

On the standard and Chronometer models, unlike the Specials and Superior Chronometers, there is no fine adjuster on the balance:

The movement number is stamped near the balance wheel:

This movement run at 18,000 beat per hour, so in good condition this is an accurate vintage piece – they are less likely to suffer from excessive wear that may be found in high beat pieces, and need less frequent servicing too. They are, therefore, worth considering if a high end vintage watch is what you are after.

The Chrono Master name has been retained by Citizen and a modern high end quartz model gives accuracy of +/- 5 seconds per year. That is more likely to be the daily variation of one of the vintage models :)

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