Thanks for the info. It seems like your trying to restore it to an appropriate era. I'd brobably do the same as you and get it going so I could ride it.

I have seen similar bikes when I've been playing around on the internet. Have a look on the Wool Jersey Gallery site - I've got a vague memory of seeing a similar Olmo there. Also look at Legnano, Pinarello, Gloria, (any old Italian marque) and look for similar seat clusters Other features as well) as your bike, it may help you date the frame.

I had a 50's frame with a Magistroni headset. The frame was way too small for me so I swapped it to a MOST knowledgable collector - He wanted it for the headset which was an earlier version to yours. He put it on a late 40's Olmo........

.....Stop the presses......I had a look at a photo of his Olmo. Low and behold, it's lugs are exactly the same as yours. The chrome is also in very similar places. I can't show you as I don't have a scanner. His is a late 40's frame as it was made for the Campagnolo Cambio Corsa gear system (still advertised in the early 50's).

From your photo of the rear dropout, it looks like a Campy item. You can easily see Brev. and it looks like you can see the "olo' at the end of "Campagnolo" When were these first produced by Campagnolo. These dropouts first appear in the 1960 Campagnolo catalogue. I looked through earlier versions fo the Campy catalogue and didn't see any track style dropouts - which is quite puzzling. I would have thought Campagnolo would have made this style of dropout earlier than 1960. Perhaps frame makers produced their own track style dropouts as they are an easy shape to produce.

Going by the rear dropout I would say your frame is post 1960 - but only just.

This has been fun - good luck,

Gary.