Vintage bike collectors place great value on pantographed parts. I gather that pantography is a form of engraving. I'd like to be educated as to the technique if this idea is wrong. I would also like to know whether, in the case of Campagnolo parts, what the exact physical technique was in doing the engraving, i.e. was this done by machine, by hand,etc.? Furthermore, was the pantography done by Campagnolo, 3ttt, etc., was it subcontracted, or was it done by the individual bike manufacturers themselves once they had the parts in hand? Was pantography done on anodized or unanodized parts? If the pantographed parts were then painted, how and when was that performed? Many thanks for everyone's help. George Hollenberg MD| (CT, USA)