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### 1st day of the New Year WRUW 1 January 2024###

13K views 307 replies 165 participants last post by  GP7742  
#1 ·
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#7 · (Edited)
Went to the Science Museum in London with my son today and they have the most amazing horological exhibit. Could have spent a large portion of the day there if I had time. This is but a tiny fraction of what was there.

🎉🥳HAPPY NEW YEAR! 🎉🥳 to all those already there!
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The actual watch worn by Sir Edmund Hillary to Everest/Chomolungma.
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#14 · (Edited)
Another nine hours left in the year! Happy New Years, all!! I was in the middle of making a drink to get the holiday underway!! Almost didn't post as the result. It's amazing how a little bit of alcohol can make one disregard the alarm and their responsibilities.

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#20 · (Edited)
Citizen ‘Crystal Seven’ ref. 61-5013, cal. 5270, May 1969
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About ten years after Citizen had restarted their watch manufacturing business, they began to designate some of their more advanced watch models “7” or “Seven”, apparently as response to Seiko’s successful entry level “5” or “Five”, named thus for five particular properties (self-winding, water- and shockproof and with displays for day and date) and priced very competitively.
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The “Seven” added to this list the possibility of manual winding and date quick-set.
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Within the “Seven” series there were several models with extra options, one of them being the “Crystal Seven”, introduced in 1965. At the time it was the thinnest day-date automatic in the world and Japan’s first watch with a mineral glass crystal.
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The special mineral glass crystal has a 98% improved translucency when compared to usual plexi glass, which it also exceeds thirtyfold in hardness, four times in temperature stability and two times in pressure resilience.
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While the first Sevens utilized the ring-rotor movements (41xx), they soon received Citizens second-generation automatics, the 52xx family. The 5270 in today’s watch was introduced in 1967 and - at 4.48 mm height - allowed particularly thin watches like this one.
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It came to me via a friend who noticed it at a flea market.
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While it’s not a “full set” it showed practically no signs of use and rides on its original bracelet.
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The “Waterproof” indicates that it was produced for the European market, domestic Japanese models carrying the label “Para Water” instead.
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On this one I particularly like the pitch-black glossy dial, the bold “UFO” shape and the unusual arrangement of the day-date display.
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It wears wonderfully on its beautiful bracelet which is reminiscent of bamboo and quite unique to this watch.
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Fun fact: When I showcased it on the German “Uhr Forum” several years ago, it triggered a discussion on whether it was truly original or somehow “refactored” - i. e., redialed or re-engined. After much research by several subject matter experts we concluded that a) there are simply too many designs to keep track of all the color schemes and arrangements of lettering and day-and-date-displays and b) that both the movement belonged into the watch and the dial was correct for a reference 61-5013. (Indeed, eBay currently has one exactly like it, full set, only with a Spanish day display and a moon price: Rarität-Citizen Crystal 7 UFO-Modell Jumbo 5013 TOP Zustand-Full Set- | eBay.)
I wish you all a happy new year! May it be better than the last one.
 
#21 ·
Citizen ‘Crystal Seven’ ref. 61-5013, cal. 5270, May 1969

About ten years after Citizen had restarted their watch manufacturing business, they began to designate some of their more advanced watch models “7” or “Seven”, apparently as response to Seiko’s successful entry level “5” or “Five”, named thus for five particular properties (self-winding, water- and shockproof and with displays for day and date) and priced very competitively.

The “Seven” added to this list the possibility of manual winding and date quick-set.

Within the “Seven” series there were several models with extra options, one of them being the “Crystal Seven”, introduced in 1965. At the time it was the thinnest day-date automatic in the world and Japan’s first watch with a mineral glass crystal.

The special mineral glass crystal has a 98% improved translucency when compared to usual plexi glass, which it also exceeds thirtyfold in hardness, four times in temperature stability and two times in pressure resilience.

While the first Sevens utilized the ring-rotor movements (41xx), they soon received Citizens second-generation automatics, the 52xx family. The 5270 in today’s watch was introduced in 1967 and - at 4.48 mm height - allowed particularly thin watches like this one.

It came to me via a friend who noticed it at a flea market.

While it’s not a “full set” it showed practically no signs of use and rides on its original bracelet.

The “Waterproof” indicates that it was produced for the European market, domestic Japanese models carrying the label “Para Water” instead.

On this one I particularly like the pitch-black glossy dial, the bold “UFO” shape and the unusual arrangement of the day-date display.

It wears wonderfully on its beautiful bracelet which is reminiscent of bamboo and quite unique to this watch.

Fun fact: When I showcased it on the German “Uhr Forum” several years ago, it triggered a discussion on whether it was truly original or somehow “refactored” - i. e., redialed or re-engined. After much research by several subject matter experts we concluded that a) there are simply too many designs to keep track of all the color schemes and arrangements of lettering and day-and-date-displays and b) that both the movement belonged into the watch and the dial was correct for a reference 61-5013. (Indeed, eBay currently has one exactly like it, full set, only with a Spanish day display and a moon price: Rarität-Citizen Crystal 7 UFO-Modell Jumbo 5013 TOP Zustand-Full Set- | eBay.)
I wish you all a happy new year! May it be better than the last one.
Where's the pic??