Hmm,Swiss thread- Stronglight, no ring, 8 sides, or Stonglight competition 2 flats, no ring.

That last photo is 2 flats, one ring and is Swiss.

It just couldn’t be easy could it? Lol.

https://www.sscycleworks.com/images/...Minor-Pits.jpg
Sakae SR-SC 35 x 1 Swiss-threaded cups

SR-SC.L- Is this SR_Swiss Cup_Left? Also has SI which seems to stand for Swiss on other makes.

Picture from https://www.sscycleworks.com/compone...ackets-SR.html

https://sscycleworks.com/images/comp...-set-01-01.jpg

T.A Swiss-Threaded (35 x 1) cup

No markings except TA and 2 concentric rings. On a previous post here from jiangshi with a chart from Sutherland's it states that 2 rings are English thread. Did ss cycle works get it wrong?

Picture taken from https://sscycleworks.com/components/...ckets-t-a.html

Swiss bottom bracket taps:
https://cimg7.ibsrv.net/gimg/bikefor...ed86c86e69.jpg

I have two Swiss bottom brackets (three counting contemporary IRD with Swiss threaded cups). One is Stronglight Competition ref.65 (cup and spindle), but that one is sitting on a bicycle right now, so no photos. The other one (below) is unknown. The only markings are letters GMA on the spindle, whatever that means. Overall, manufacturing quality is poor, both when it comes to the spindle and cups. Usable, but nothing special.
Spindle length is 126mm, distance between the bearing retainers is 52mm (centre to centre). Photos do not show the lockring. I have it somewhere, but need to find it :)


https://cimg0.ibsrv.net/gimg/bikefor...b7260ba1a5.jpg
https://cimg1.ibsrv.net/gimg/bikefor...d3aef2952f.jpg

No markings, you could quite easily overlook them thinking Swiss thread would always have a marking, and without a thread gauge would just presume English thread if you observed a left hand thread. Moral always carry a thread gauge when bit hunting…..not easy on eBay through…

I got it from eBay France about 2 or 3 years ago as a backup and the auction description mentioned "filletage suisse". In the end, the spindle is too long for any of the cranksets I might be using, unless I decide to build something with triple chainrings. I do check French eBay every now and then and sometimes Swiss threaded bottom brackets or cups do pop up. But it's probably worth checking when they just mention 35x1 and try to see the thread direction. Some of the sellers might not be aware of the Swiss standard (probably most of them are though).

If it's a Peugeot-BB-made-by-Solida, six lines in a star centred on the axle hole mean english, a ring around the edge mean swiss.
They are otherwise unmarked.
That "GMA" adjustable looks as though it has a ring...does the fixed?

Yes, it's a circle in the middle of the spindle. It looked to me like a remainder of the location where metal was poured into the cast, but on closer inspection it could be a marking of some sort.

I perhaps wasn't clear: the adjustable cup that goes with the GMA labelled axle - it looks to have a ring around its edge; does the fixed cup also have such a ring?

No, there's no ring there. It's just where the thread starts. No markings whatsoever I could see on the cups. Just signs of machining and 35x1 Swiss thread. I need to find the lockring, but I don't recall any markings on it.

https://cimg4.ibsrv.net/gimg/bikefor...5f4a104f1.jpeg
Shimano Swiss btm bkt

Sorry for the sketchy drawing!

Swiss and french sakae.

https://cimg0.ibsrv.net/gimg/bikefor...839efa3f6d.png

https://cimg9.ibsrv.net/gimg/bikefor...0d54fe841.jpeg
From the Blackbird T.A. sight. One ring (like the French thread) G on fixed cup and the same X’s on lock ring edge, same a French threaded lock rings. Looks like SS cycle mixed up with an English threaded cup.

George Turing had a touring bike with two-ring drivetrain and two-ring BB cups.
Three rings is a total circus IMHO...
<hides>

Sakae Swiss-threaded cups from a Motobecane Grand Record -1978. Cranks are dated 1977.
No indication of Swiss-ness on the outer face:

https://cimg7.ibsrv.net/gimg/bikefor...13fde9ee46.jpg
French? Non!
https://cimg6.ibsrv.net/gimg/bikefor...2cdd09fffd.jpg

I did not think Shimano or any other big Japanese component maker would have bothered to manufacture Swiss threaded BBs as it was just a mainly European quirky spec that did not really last that long. Stronglight provided a lot of the Swiss threaded BBs that Peugeot used on their bikes. That said, even Stringlight did not really put much into identifying marks on their Swiss threaded cups. The ones that were on my 84 PSV did not even have any Stronglight brand markings or threading callouts or mentioned rings.. Totally bare and frankly, quite cheap looking. That just shows how much they really thought about continuing to use Swiss threading for their BBs by the mid 80's.