126 thoughts on “ How to identify a fake or genuine Colnago ” nusnusds. Seller does not provide serial number! May 13, 2015 at 1:04 pm Reply. The Master and Tecno have the serial number stamped on the Right Rear Dropout. From recent threads, I read that Colnago now place the serial number on the Front Derailleur Mount. But there isn't one on my C50 but I did find a serial number stamped on the Left Rear Droput, just like the photo shown on www.cyclingnews.com.
Started new thread on this subject in the hope of identifying more numbers. With a lot of help from Doug (CBguy) on frame identification I have updated the numbering charts seen on the original thread. A summary of the various numbering systems used by Holdsworth is shown below with more details on Goggle Cloud. This is based on a growing number of frames found on line and information from other websites on the subject. The following are the systems that these numbers seem to fall into. Post war 5 Digit numbers and the continuation of this from 1965.
Early 60's 4 Digit numbers (1962-1964). Shop numbers from 1965 with 1st 2 digits for the year. Early 70's 4 Digit series (with leading zeros) including branded frames. 6 Digit System from 1976.
The predictions shown are based on the usage of Factory issued numbers and steady production of 1500 frames per year up to 1961 and 1200 frames per year from 1965 when the shop had its own system. 6 Digit numbers have an increasing yearly production up to 1985. The Framework graphs show how this fits around known fixed points in production and frames with good dates or documents to back up their dates. There are issues with this mainly around shop frames and others that seem to have taken longer to progress through the factory. There are also a few that show up too early, for which I have no real explanation. I have show these on the graphs to indicate the level of accuracy that can be expected with this approach. All other frames with less clear dating have then been added in where they would occur along with the original description in the Excel sheet.
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I would be interested in any frame numbers, particularly those with good dates. Hope this is of interest. Great work Dave! Impressive documentation and a great resource for all for narrowing the year and identifying model with help of catalogs. When I last counted a few days ago there were approx. 200 serial numbers listed on your excel spread sheet. Things are certainly becoming clearer as numbers are added.
THE MORE NUMBERS THE BETTER! I wasn't aware of early 70's 4 digit special numbers until recently after discussing a frame with Hilary Stone that he has for sale. (Often these frames appear to be factory models customized for smaller shop re-branding as example Harding) Doug. Great work Dave! I wasn't aware of early 70's 4 digit special numbers until recently after discussing a frame with Hilary Stone that he has for sale.
(Often these frames appear to be factory models customized for smaller shop re-branding as example Harding) Doug I have a Holdsworth (proffesional) framed DBS (Norwegian bicycle manufacturer), with four digit frame number 4905, which according to the above could be a 1974 made frame, and probably sold for the 1975 season here in Norway. This year fits well with the decor/decals of the bike and the components mounted.
Some pictures of the bike can be found here. _________________ Per Crescent 202 1953 - BSA Golden Fifty 1960- Crescent 208 1963- Monark Super Continental - DBS Supersport 1967- Falcon San Remo 1968 -Motobecane Team Champion 1974 - Holdsworth Strada?
1974 - DBS La Migliore (Holdsworth) 1976-DBS Internazionale 1976 - DBS Touring Tandem 1978- - Gitane/Alan Competition 1977 -DBS Professionale (BaCo) 1979- DBS Professionale (Holdsworth) 1979 - Rossin Record 1979 - DBS La Migliore 1980 - Gitane Olympic 1982 -Dawes Imperial 1984 - DBS La Migliore (Daccordi) 1985 -DBS La Migliore (Daccordi) 1986- Eddy Merckx Corsa Extra 1987 - Netroh Performance (Razesa)1987- Rossin Ghibli 1988- Knudsen (Somec) 1988-Kirk Precision Competition 1988 - DBS Professionale (Daccordi)1990- Rossin Dominator TT1990? - DBS Internazionale 1991- DBS La Migliore (Daccordi)1995 - Crescent Pico 2300 TT 1999. Hallo Dave, It seems that my HW Pro is moving back in time. You may recall that it is a 338xx number which now appears to be 1968 year on the revised listing (from 1969). This is not a problem for myself, and I really appreciate the work which you have put into this problem and how useful it is, but there are comments on other sites which state that chromed forks and tail were only applied in 1970 and after. As mine has been restored and repainted I could wonder whether it authentic for that year.