What is this 103 decal referring to?

[JanJ]

http://www.ebay.com/itm/0390-Peugeot-Bicycle-Frame-Tubing-Decals-HLE-103-Carbolite-Choice-Of-6-/230856709285?pt=UK_sportsleisure_cycling_bikeparts_SR&var=&hash=item35c021d4a5

Please look at #5 in the link.... It's what I found on the fork while cleaning the bike tonight.... It's been there all this time... I just now 'discovered' it...

I did a brief search on Google and it might be an indicator of the type of tubing used on the frame? I assumed that it was a steel frame... Though this week when I pulled the crank pieces I found no rust in the insides, which I would have assumed to find in a 40-some year old bike... ????

As of this point, I'm thinking I have a Peugeot 1978-80 U09...

Farther I go, the more I find I don't know!!!

Thanks, as usual.....
Jan

[nfmisso]

Carbolite 103 is a low carbon plain steel (iron-carbon alloy) used on low end Peugeot bikes, similar to 1020. The frame and the forks can be different materials.

[JanJ]

I does seem to be withstanding rusting nicely (internally).... Thanks for confirmation..