The Colnago serial number database. As yet does not exist. This is just what I discovered by trying to research online the following from a ’73 Colnago Super restorer “Early Colnago’s can be a bit difficult to determine their exact age because they didn’t use serial numbers. At most they would have a size stamped on a drop out and steer-er tube.” The earliest presumed date of Colnago incorporating a serial number onto frames is mentioned by Chuck Schmidt, author of the site “Serial numbering only started for Colnago on USA-bound bikes when the CPSC started requiring tracking, etc. West Coast Cycles was importing Colnago at the time and the serial numbers started for their product. There is still no way to find manufacturing date by the numbers, except that they are 1979 or later.” Chuck is also the author of the, from 1968 – 1983, and here there is no mention of factory stamped serial numbers. Here’s some examples of Colnago bottom bracket shells, with the brand’s stamp and clover cut out, but no serial numbers On later steel models,like the Master Olympic, the Spiral Conic slx. Universaljnij sportivnij kompleks dwg proekt en.

Edit: if it is a merican, which form a quick google glance it might be, judging by the filed lugs & cut out it could be, it still is a very nice bike, mericans are british made, not as well known as colnago, but of simular quailty. But it could also be a number of other makes. I know it is a Colnago, but that is it. I am not sure this is a Colnago. By their serial number: http://saarf.net/category/colnago-serial-number/.

And the Tecnos. The number can be located on the drive side rear drop out and can be fruitful in exact dating, but as yet. This information is not accessible directly online.