Chronograph Article Update

I’ve just put some improved scans of the parts and schematics pages in the article – my original attempts were not very good!

And I’ve added a reference to the grey dialed Challenge Timer (‘bullhead’) – with many thanks to Jaliya (JAY48) who has helped research this model.  I’m now pretty sure that this was originally produced as an alternative to the black dialed version, the one with a printed Citizen logo. Hopefully I’ll be able to add a decent image of this one soon – edit> now added a pic with thanks again to Jaliya.

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Homer Tree Now Version 2!

Within a couple of days of publishing the 02 Homer Family Tree, I’ve been able to confirm a model in the ‘Homer Date’ line that I hadn’t been able to before. With the help of ‘johnbaz’ on the Watch Forum (thanks :)) I’ve been able to add the ‘Valiant’ model to the relevant box (180). So with the addition of the ‘Pansy’ as per my previous post I’ve uploaded the revised tree as Version 2.

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Homer Family Tree

I noticed that I’d missed one model name in the ‘020 Homer’ box, which is now corrrected. This is the ‘Pansy’ variant – rather rare nowadays, these were made in the early 1960’s with coloured dials. Here’s an example of the yellow one, with the red and green versions illustrated too:

[photo by kuma-kun, SCWF, with thanks]

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Second Family Tree Now Uploaded

Just added a second movement family tree, this time it’s the automatic 52 group. This one is based on the Crystal Seven movement, one of Citizen’s best known models – it’s also interesting to see what other models were based on this movement. In fact it’s quite a range….

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First Family Tree Available

The first of a new way of tracking the movements used in model ranges is now available. In the form of a ‘family tree’ this lets you see what models a particular base movement was used in, and includes some key information about each version.

More info is found on a new page here: https://sweep-hand.org/family-trees/

If you want to go straight to the first one, on the 02 ‘Homer’ caliber, here’s the link: http://homepage.ntlworld.com/stephen.netherwood/020HomerFamilyTreev2Secure.pdf which is also now in the Blogroll on the right side of the blog.

Any / all comments welcome! 🙂

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Movement ‘Family Trees’

Alongside updating the Movement Table, I’ve been working on a first ‘Family Tree’ to show how a base movement is used and developed over time, not only in one model line, but also in other models which initially can appear very different.

I’ll be uploading the first ‘tree’ soon, so please watch this space 🙂

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Movement Table Updated to Version 4

Just uploaded the latest version of the Movement Table. I’ve given it a full new version number (from 3.3 to 4.0) since there are quite a few revisions this time.

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This Week’s Featured Watch #29 – The Leopard 7600

Most of the models in the Leopard range featured both date and day windows, whilst a few top of the range ones had date only. But there were one or two that had neither – just plain vanilla dials. These are not seen very often, perhaps most buyers would be looking for date and day features on these quality high beat pieces, and they were given the 7600 movement designation.

The 7600 is a ‘super beat 8’ model, i.e. running at 8 beats per second / 28,800 beats per hour, and the example I have got hold of has the case number 4-760018. Although not in the best of condition it is all original, although missing its original mesh bracelet. The thick mineral glass on this is thoroughly scratched, even after a fair bit of polishing:

It’s good though to see the original radial brushing of the case, and the chunky crown reflecting the hand winding feature on this automatic:

Serial number shows production in March 1971, and the case is still marked ‘parawater’ – it was around this time that ‘water resistant’ was being introduced:

The 26 jewel ‘hacking’ movement is in decent condition – and the inside of the case back shows servicing has been carried out:

The 7600 Leopards were priced at JPY14,000 in 1971, so were an upper mid-range watch at the time.

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Bit of a Glitch – Now Sorted

Noticed this evening that the header image and images in the latest Featured Watch post (#28 the Homer Railroad) had disappeared! No idea why this happened, but have now restored them, hope it didn’t cause any inconvenience…

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This Week’s Featured Watch #28 – the Homer Railroad Watch

About five Featured Watches ago, I covered the ‘humble Homer’ (https://sweep-hand.org/2012/02/23/this-weeks-featured-watch-23-the-homer/). However, one model I didn’t include since I believe it warrants a feature of its own, is the the so-called railroad watch. And it has this name for good reason, since it was official issue to Japan’s National Railways staff in the 1960s and 70s:

Simplicity and clarity appear to be the design priorities for this one, as well as the use of ‘second setting’, more commonly called ‘hacking’ – a feature not normally found on the Homers. This allows watches to be synchronised and was no doubt a requirement on the famously reliable and punctual Japanese railway network. The white dial, which has a slightly blue tint, has very clear numbers, with lumed hands and pips outside the hour markers:

Other than second setting, the 21 jewel movement appears to be standard Homer, although I don’t know if any additional adjustments were made for accuracy at the factory before issue (note the crown is pulled out in this shot to ‘hack’ the watch):

Inside the somewhat pitted caseback there’s evidence of servicing fairly recently:

But it’s the outside of the case back that is particularly interesting, since it is specially marked:

The upper symbol and ’50’ is the Showa year of issue, so this is 1975. Here’s a conversion chart for the Japanese calendar for information: http://photojpn.org/PPC/gui/year.html (with thanks to Philbert Ono)

I presume 1934 is the issue number of the watch, whilst I understand that the lower characters probably read ‘National Railways’ (West Division).

This shot better shows the chrome frames of the hands:

The signed crown on this one is the earlier type, more usually seen on pre-1970s watches:

A classicly simple watch, perfect for use on the railways of Japan:

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