Originally Posted by
rbauer1001
Any idea what the stampings on the INSIDE of the rear dropouts means? I have a Super Corsa (date stamp 4431, so 1971) with a large "L" above "0" inside both rear dropouts, and a Tour de France (date stamp 3272, so 1972) with "Y" above "2" on the inside of the dropouts. I also have a 1971 Tour de France (date stamp 1231) which does not have any marking on the insides of the dropouts.
Due to the nature of the stamping you need to provide pictures of each serial number stamping, so that the four digit date code can be correctly determined.