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Wrist Check

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This is a Seiko 6139-7100 aka "Darth Helmet." This particular unit was manufactured in 1977.

The "6139" refers to the Seiko Cal.6139 automatic chronograph movement, which was one of the first automatic chronograph movements ever developed. There were two other automatic chronograph movements released in 1969 - the Zenith El Primero and the Tag Heuer Caliber 11. Regardless of the debate of which movement was released first, it was definitely a historic year in horology.

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The "7100" refers to the case shape, which is sort of reminiscent of a motorcycle helmet. This case reference has two variations: A white dial ("Helmet") and a black dial ("Darth Helmet" or "Darth Vader"). You can see these two references in the picture above.
Case width: 40.9 mm

Thickness: 14.1 mm

Lug width: 20 mm
Lug to lug: 48.5 mm
My wrists are 7" in circumference, or just a hair under. The strap is a Nomos "seconds" shell strap.
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agrberg
1
Jun 24, 2016
Is the Orange face one the Pogue?
ChristopherJ
1189
Jun 24, 2016
agrbergYep, you're correct! It's the 6139-600x, so it has the same movement as my watch but it has a different case design. For anybody reading this who has no idea why it's called the Pogue: It was named after Col. William Pogue who wore this watch during the Skylab missions, making it the first automatic chronograph worn in space (a few years after the manual-wind Speedmaster.)
The dial is a brilliant yellow/orange sunburst - pretty distinct. You can see a pic of Pogue's actual watch here: https://en.wikipedia.org/wiki/William_R._Pogue
agrberg
1
Jun 24, 2016
ChristopherJI would love to have one of those! I find Seiko's style and quality to be the best. One day I want to have a Grand Seiko with Spring Drive *drool*
payodpanda
958
Jun 20, 2016
I really like that watch, I've almost bought it multiple times off eBay.
For this thread, what I'll also recommend is also posting your wrist size, so people can see how a watch fits on a particular wrist size. Lots of people feeling "my wrists are too small won't this 42mm be too big?" or "I have huge wrists I don't think this small dress watch would look good". I am firmly in the first category :)
Posting some photos I've posted previously elsewhere.
My wrist size is ~6.25", ~6.40" on a good day :) Sorry if the straps confuse you, I use the same leather nato on a lot of my watches. ^^'
Seiko SARB017 "Alpinist", 39mm case, 46mm lug-to-lug
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Maratac Mid Pilot, 39mm case, 45mm lug-to-lug
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Aevig Valkyr (bronze), 39mm case, 48mm lug-to-lug (extremely comfortable shape btw)
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Looks clunkier on a heavier nato:
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Seiko SSA005, 44mm case, unsure about lug-to-lug and don't have any high resolution measuring instrument. Too big for my wrists, I think I'll sell this off, I've maybe worn this less than five times in the past one year.
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