I have three Colnagos - Master, Tecno and C50. 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.

http://www.cyclingnews.com/tech.php?id=/photos/2007/tech/news/02-14/Colnago_Extreme_Power_dropouts

So ... any particular reasons why, for late model Colnagos, some have SN on the Front Derailleur Mount and others on the Left Rear Droput?

My C-50 has it on the inside of the left rear drop out.
The fork has it on the shaft. (It is blocked by the head tube so you have to pull out the fork to see it.

I don't usually start a post, so I was waiting for this opportunity: could the location be a tipoff of where the bikes are being sourced now?

In the last six months, I've heard on two occasions that late model C50s are being made in the Far East. The source of these remarks are LBSs, who have no motive in either direction. The LBSs were dead on back in early 2006, about the 2006 Pinarello Gallileos being made in Taiwan.

Can anybody confirm or deny these claims? Dnalsaam? You are usually on the money.

My C50 is supposed to be a 2005 frame, and the s/n is on the left rear dropout.

Hello all 1st post for me so be gentle :) my 06 ETWN Cristallo has the S/N in the same place as the C50's mentioned above...not sure about the steer tube though? will have to look next time it gets stripped for a clean.