[MENTION=417604]Mr. 66[/MENTION] could you elaborate on the 3-pin method? A quick google search hasn't turned up anything immediately useful. It's not just going to pop back out, I tried stepping on it, on the ground with the bend pointed up, just to see how stiff it is.

[MENTION=78948]ethebull[/MENTION] , would a 777 serial number match with the mid-to-late '70's? That seems to be about the period for bottom bracket generators, I think it's interesting that there's the bb generator wiring brazing, rack attachment brazing, and a bunch of other unexpected brazing, including the wrap-around stay treatment.

I like the assortment of shims holding up the rear triangle. :thumb:

Very clever. I don't see a difference between the two methods. What did you change?

Thanks! It's helpful to see how you did it.

noglider, he moved the blocking from the top of the top tube to the terminus of the seat and head tubes. - to allow for more deflection?

Ah yes, I see now.

Going back over your original pictures and the additional ones, my best guess is this was a frame made by Chris Tuccinardi, a long time employee at Proteus, quite possibly for his own use. It has many of his favorite bits and details in the build. A Roto cast BB shell, Henry James lugs and crown, the then less common single loop brake cable guides, Zeus dt shift bosses... and he would do the full wrap seatstays too. HJ lugs were introduced in 1977, Maybe Chris finished the fame in July of 77, or the "serial number" was just a random one that Chris liked. Chris also liked BB generators, and it looks like it would be about his size frame. Yeah, Chris built it, almost for sure, very likely for his ride.

Here you go

Thanks, it'll be hard to get more definitive than this! So happy you're on the forum and willing to contribute your knowledge. It's holding up a spot on the wall until I eventually get around to it.