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Took me a while to find a good one. I'm finding all sorts of wondrous stuff on this trike forum.

Thank you Paul!!! I'm much obliged. I had not found this. I've just looked at a few posts and I already have learned some stuff and saved down some pictures. I recently purchased a 1947 Holdsworth La Quelda from Hilary Stone and eventually will mate that with the conversion unit. This...

The forks look enough like Holdsworth forks that I've got no qualms about using them. They probably aren't Holdsworth forks. I can barely read the numbers myself even in a good light. It looks like there's a 22 with a space, then maybe 427? Someone wrote over the top of the stamped numbers...

I purchased this La Quelda from Hilary Stone and had it shipped across the pond. It's a 53cm which will be much better for my trike project than the 61cm frame I recently purchased. The serial number on the BB is 7870 and has an H just below the number. This would put it smack into 1947. The...

Thanks Keith, I'm not savvy enough to ID lugs. Scrimshaw believes them to be Nervex lugs and I'll go with that. Tube sizes look standard to me. It's 61cm too big for me in general. I was looking for an inexpensive frame and this one cost me less than $100 shipped. I usually ride a 53 or...

Yes, Keith the dropouts or "ends" are indeed Campagnolo. Thanks for the above tips Mr. Scrimshaw. One embuggerance is that a lot of frame photos don't show the rear brake bridge in a lot of detail or at all. It will be fun trying to figure it out. There are plenty of Holdsworths with...

Hey Gents, I'm nearly certain this is not a Holdsworth frame just from the number. I thought someone here might have some input as to what it might be. What I know: Size: 61cm Dropouts: Campy Serial Number MPV 289 The lugs are quite nicely done. The rear brake bridge may reveal some clues...

Re: You're right. It's one of the reasons I'm trying to find some good diagrams of these. I have a single-speed freewheel that fits nicely, but I'm still scratching my head over some other technical questions.

32 hole actually. The freewheel block sits so far away from the derailleur, I don't see how it could function properly. I've seen photos of it being done though. This is going to be a challenging adventure to be sure.

I recently picked up a Holdsworth tricycle conversion kit and am wondering if those work into the serial number chart in any way. It would be great to get an idea of when it was made. I've been wanting one for a long while and finally got one in pretty decent condition on eBayUK. The serial...

Sorry I forgot to add that. It's a 26.8 oddly enough. Gave me some serious headaches during the build as I could not get a good measurement with my calipers. I assumed it was 27.2 and was wrong. I had a lovely aero Campy post I was going to use, but it didn't fit. Also, my Gemini tandem has...

Since I was in the garage with the camera I thought I'd snap some of my Mistral and send. I realized I had misread the number on this one as well. It looks to me now like it's 43631 and not 43831 as I posted earlier. I bought this frame in San Jose, California in 1978 to replace my beat up...

Pictures of the other "shop" frame 69364. The head badge did not come with the frame, I'd purchased it separately. Attaching a photo of how it looked when I received it. It hung in my garage for about four years before I got a bee in my bonnet to do something with it. The water bottle bosses...

Hi Doug, As far as the tubing goes for either frame, I am completely in the dark and not expert enough to be able to spot the difference. Both frames were purchased on eBay. I'll attach photos I tool of the lug work and fork crowns. It takes a 27.2 seat post. Note the odd head badge. I...

Since I shared these photos privately with CBguy, I thought I'd post them for the group. These are my two "shop" bottom brackets and bikes. - Eric

Gents, I just realized I had one serial number incorrect. The cyclocross bike's serial number is 69387, not 69337.

That's my tandem all right with a few differences from the specs in that catalogue. Mine doesn't have the "Gemini" decals along the top tubes. Mine has Suntour XC mechs rather than the Suntour Cyclone mechs in the specs. Mine also has Wolber Super Champion rims rather than Rigidas. I...

Double checked the serial number just now. It's on the forward bottom bracket. 60171. In general it's a 531 frame with Haden lugs. Sort of a pinkish salmon color just like in the catalogs. Stronglight cranks, suntour mechs, diacompe cantis and a big rear drum brake. The only modifications...

Re: Holdworth Frame Numbers Thank you for the excellent reference materials. I've been able to peg all four of my Holdsworths. 43831 - a Mistral I purchased new from Shaw's Lightweight Cycles in San Jose, California in 1978. Deeply discounted because he'd had it hanging in his shop two...