This is a hand built 1968 Allen of Thornton Heath near Croydon but the frames were built by Holdsworthy as far as I know, Allens were the rivals of Geoffrey Butler at the time:
Campagnolo Nuovo Record Group
6 speed Regina Gold Block
Del Assandro tubs originally
Mavic Montlery rims
Italanubra bars and stem
Unica Nitor Saddle
Christophe toeclips
Binda straps
Campagnolo Nuovo Record Group
6 speed Regina Gold Block
Del Assandro tubs originally
Mavic Montlery rims
Italanubra bars and stem
Unica Nitor Saddle
Christophe toeclips
Binda straps