Shaun's comment got me wondering when the 7102009 Campag braze on became available. I've had a look back though some period magazines and books and it seems that a few pro teams were using it in 1981 and it may have been available as early as May 1980 - I think Bernard Hinault's `Profile' Gitane time trial bike (the one with squashed tubes and backward facing brakes) may have had one. Still looking for a clear picture to confirm.
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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