Bottom Bracket ID
 

Anyone know this BB origin? It’s on an early 80s Nobilette. Thank you.
https://cimg1.ibsrv.net/gimg/bikefor...43439d309.jpeg
https://cimg6.ibsrv.net/gimg/bikefor...0a44c1b16.jpeg

Think I may have seen this once before, possibly "Eisho"? It's been long enough I have no clear memory (no surprise).

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does serial indicate the sixtieth frame and a size of fifty-four cm?

Tim did not create a great many frames

iirc he may have changed careers shortly after this


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Not Tim. Mark Nobilette. He’s still in business in Colorado.

Not sure on the serial number deciphering. I’ve reached out to him.

An EO within a diamond is the trademark of Otsuya Iron Works, a Japanese lugs and BB shell manufacturer

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thanks so much for putting right this old man's very rusty memory! ;)

will do me best to get something correct soonly... :rolleyes:


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thx

I heard back from Mark Nobilette - he's awesome. He sent me the full original build sheet. Bike was built in 1984 and retains the original paint and most of the original SR groupset. "Needs" SR wheelset (currently on "Sealed Bearing" CyclePro / Miche / Specialized with Wolber Super Champion Gentleman GTA) and some small bits and pieces (gum hoods, cello tape).
https://cimg0.ibsrv.net/gimg/bikefor...92db8cd800.jpg


Bottom Bracket Shell: EO (Eisho)
Lugs: Prugnat S4
Tubeset: Columbus S4

The bottom bracket shell is not Eisho (Seisakusho). Their trademark symbol was an ES within a diamond.
https://cimg1.ibsrv.net/gimg/bikefor...b5d39dd1c9.jpg