The C-Cased Girard Perregaux HF Chronometer Thread

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OK, this is a slightly tongue-in-cheek homage to the great C-Cased Constellation thread.. 😉

The first commercially sold 36,000 bph watch was the Girard Perregaux HF Chronometer, model 8795 with the 32A movement. It had a "c-shaped" case, remarkably similar in style to the Omega c-cased models (168.017. 168.019. 168.027. 168.029, etc) and doubtless inspired by them. The later model 9086 with the 42.1 movement was almost the same watch, just with an antimagnetic shield and a hacking feature.

I love these watches almost as much as the Constellation c-cases, not least because there appears to be a huge variety of different dial and hand designs, most of them rather uncommon.

Maybe people can post their examples here. I expect that this will be a rather occasionally updated thread as these watches are a little niche!

Here are my two (steel 8795 with original bracelet, and 18K 9086):

 
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My somewhat blotchy version. I agree they are lovely watches. Thanks for making a home for them!
 
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GPhfAu2.jpg
 
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Both of mine are astoundingly accurate and stable across different positions. Which is more than I can say for my Longines 431 36,000 bph, which is a little temperamental. Small sample size though!
 
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Here’s my gold plated version, Ref. 9086.



gatorcpa
 
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Love the GP HFs. Can't play in the c-case game, but do have this:
 
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1972 Catalog page:



gatorcpa
This is rather fascinating, not least because Girard Perregaux told me that "Ref. 9086 was made between 1974 and 1976", something that always struck me as odd as I'd assumed that the 9086 came out immediately after they stopped making the 8795 around(?) 1969/1970 (it's basically an updated 8795). Also, there were clearly later models such as Boojomhunter's watch above, with the "high frequency" lettering on the dial and a slightly redesigned c-case. I'd be surprised if those models were made at the same time as the 9086, and if the 9086 was made until 1976 it would make those other models late 1970s, which is quite late.
 
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What a treasure trove!

I see now that the "high frequency" dial lettering was contemporary with the "Chronometer HF". Looks like it was used on the non-chronometer certified models. Chronometers have "Chronometer HF" at the top of the dial under "Girard Perregaux" and "Giromatic" at the bottom, while non-chronometers have "Giromatic" at the top and "high frequency" at the bottom.
 
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No C cases, but a Ref 9000 and blue tuxedo racing dial (kind of in between the Observatory cases and a C):
 
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Here’s my sparkle dial 9086, still on it’s original GP strap with sun buckle.



The GP museum provided this info:

“The GP 41 movement, based on an AS 1843 ebauche, has been produced in 1968. The other number on the main plate is individual. It was needed to pass the Observatory tests. The ref. is 9086 FA. There were several versions (steel, gold plated and 18k gold). In steel like yours, 500 pieces were made, with different dials. Its retail price here in Switzerland was CHF 380”.
 
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Source:http://nakahiro.parfait.ne.jp/catarog/moji/top.html

These look to be from a jeweler’s catalog, separated by brand.

There’s catalogs from 1970 as well. The GP catalog also has Ref. 9086.

http://nakahiro.parfait.ne.jp/catarog1970/moji/girard1970.html

gatorcpa
This is an amazing resource. Do you know if there's a menu page for the 1970 catalogues? I've managed to find 1970 catalogues for other brands by swapping the name in the link above (e.g. "longines1970.html" instead of "girard1970.html"), but the parent directories are inaccessible.
 
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This is an amazing resource. Do you know if there's a menu page for the 1970 catalogues? I've managed to find 1970 catalogues for other brands by swapping the name in the link above (e.g. "longines1970.html" instead of "girard1970.html"), but the parent directories are inaccessible.

There's a "BACK" button at the very bottom of the page that will lead you to the menu with the brand names, and when you go "back" there again, you can choose between 1970 and 1972. Those catalogues are great, so many nice watches in one place ...
 
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There's a "BACK" button at the very bottom of the page that will lead you to the menu with the brand names, and when you go "back" there again, you can choose between 1970 and 1972. Those catalogues are great, so many nice watches in one place ...
Brilliant, thanks!

Tempted to download them all and make PDFs just in case they disappear sometime..
 
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No C cases, but a Ref 9000 and blue tuxedo racing dial (kind of in between the Observatory cases and a C):
I'm curious about the blue dial day-date. From some research, these watches used a different movement series from the other GP 36,000 bp watches. The 32A, 42.1 etc. were based on the AS 1687/1688, while your watch has the GP 440 movement (based on the AS 1920).

The day-date option wasn't available on the 32A series. In the 32A however, the date changes instantly at midnight, Rolex fashion. I'm curious whether the 440 day-date retains the instant change or whether it changes gradually over an hour or so (like the Omega 751). If it has an instant change, it would be one of very few day-date watches that have instant change for both day and date at midnight.
 
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Not a chronometer, but definitely a C-cased gyromatic. In this case, my diddy ladies' version. The linen dial really pops in sunlight.