This Week’s Featured Watch #51 – the Diamond Flake

In 1962 Citizen introduced the beautifully named Diamond Flake based on the 0700 movement. Why this name? well a diamond flake would be thin, and at the time the 0700 movement was the thinnest Japanese design, measuring just 2.75mm deep – beating the Seiko Gold Feather by 0.2mm. I say ‘beating’ because there was something of a race to produce the thinnest movements, following the fashion for ever slimmer dress watches.

Here’s an ad from the time:

The movement was made with either 25 or 31 jewels, and later a date version was made (2700 movement, 25 jewels). My example has the 25 jewels calibre:

The logo at the 12 0’clock position is unique to the Diamond Flake, and the narrow hands on this model emphasise the slender overall design:

The thin movement allows a slim case:

This is a hand winder of course, an automatic would have been necessarily thicker to accommodate the rotor and auto winding system. The gold finish of the movement indicates that this was a good quality model:

The case back, with production in September 1963:

Some models were depth rated to 40 meters, but these were essentially dress watches, wearing light and comfortable under the cuff.

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7 Responses to This Week’s Featured Watch #51 – the Diamond Flake

  1. stuartm1970 says:

    Reblogged this on Vintage Watches Middle East.

  2. Scott says:

    Stumbled across this through Google, nice watch! What’s the case diameter on yours?

  3. Scott says:

    Sounds like a good size. Any interest in selling it or know where I can locate an identical one?

    • sweephand says:

      Hi Scott, not for sale I’m afraid. These aren’t easy to find :( They occasionally crop up on eBay, although sometimes in poor condition – that’s how I got my parts watch.


  4. scott says:

    If you ever change your mind… :)

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