These bolt fixings (Dave's photo) were a Peugeot special design - I had one on my `Specialist Routier' delivered in 1985. Had it removed when the bike was resprayed in '89 as it limits you to Simplex front mechs. I also had the stupid grub screw seat post fixing taken out.
They first appear in the '82 Peugeot catalogue - although if you find enough pictures of Phil Andserson leading the '81 Tour, I think you'll see they existed then.
Thereafter Peugeot frames had band-on front mechs (no boss), at least until my catalogues run out in the early 90s. Ajoten, is yours a bolt type braze-on or the more conventional Campagnolo type sitting at 90 deg to the frame? Do you have a picture?
Regards
Paul
---------------------------------------------------------
1975 Gazelle Champion Mondial, 3 hole Gran Sport
1978 Gazelle Champion Mondial, Super Record
1985 Gazelle Champion Mondial, Victory
1983 Raleigh Gran Sport, Gran Sport
1984 Raleigh Team Replica, Nuovo Record
1987 Peugeot Aneto, Chorus
1988 Peugeot Perthus, Croce d'Aune
1977 Olmo Grand Prix, Valentino mix
Early 1980s Cerbai Special, Super Record
1982 Alan Competizione, Super Record
1984 Ciocc, 980 mix
1985 Colnago Super, Nuovo Record
1986 Rossin `Team', Super Record