I am at a bit of a loss here... the serial number is stamped under the BB and reads "58 1628".

I thought I knew what it was until the bottom bracket underside....haha.

After seeing it...Bottecchia?

Also, the seat tube lug cutout looks like a rose rather than the V of the head tube lug. Aero levers...1980s...?

IDK but is the 58 the size? Looks like the shift cables go into the downtube. The rear one comes out the right chainstay. Where does the front one emerge?

Try putting in cups - is the BB British thread? Italian?

This has written all over it.

Plus one.

The mystery frame was made by Olmo and, if located in the US, was almost certainly badged Nishiki Cervino.

Here are some pics:

I thought Viner made the Cervinos?



Edit: perhaps the Gozzi brothers is more accurate.

Dang. @Maurice Moss to the rescue once again!

I don't think so; not the OP's frame, at any rate. The OP's frame shows the serial number format used by Olmo, like this:






While it's possible West Coast Cycle contracted both Olmo and Viner to make the Cervino, I would be surprised if there were two contractors involved, given how few of those frames exist.

I'm aware of only one Cervino with Viner decals and that's the frame from classiccycleus.com that made its way to bikesnobnyc.com. Neither goes into any detail of why they think it's made by Viner and, since neither shows any pics of the bottom bracket, it's impossible to say what the origin of that frame is. Also, classiccycleus.com calls Nishiki a "Japanese bike company," so I'm taking the Viner claim (despite the decals) with a grain of salt.

Of about a dozen Cervinos I've seen, they've all had Olmo serial numbers, so I would be very surprised if bikesnobnyc's frame had a Viner style bb shell.
​​​​​​​Viner, as far as I know didn't use serials but stamped the dimensions along the opposite edges of the bb shell (at least during the Portacatena years), like this:


​​​​​​​

Here's a photo of Eben's Cervino bottom bracket shell - looks like the Olmo serial number format:

Good job finding that shot. Yep, that looks like an Olmo number. Not sure why the Viner decals made their way onto that frame. Maybe the Olmo name still carried that stigma of being called the Schwinn of Italy?

Likely has an internal guide bridging the bottom of the seattube, exiting through the centre of the gap between the chainstay sockets.

I asked Eben for it

He mentioned it in this blog post: https://bikesnobnyc.com/2024/08/09/b...et/#more-28894

Nishiki did not hesitate to re-badge Italian framesets to sell under their name brand. Another notable example is when Nishiki re-badged Alan Carbonio CF framesets to add to their model line in the mid 80's......