I'll try to post some pics tonight of my Bertin C70 (I think). It has thinned and cut lugs that were obviously done as quickly as possible. Very uneven in places. According to the Classic Bertin page, they started using a mix of Reynolds, Columbus, and Vitus tubing in the early '80s; which would probably account for why there isn't a tubing sticker on mine. All told, I really like the bike even though it's technically 3-4cm too big.