Chrome nervex-style lugs on a Competition? The first aooearance of the Comp that I can find is the Mark II the 1973 catalogue. Perhaps the Comp was offered in England earlier, and with chrome lugs? (since "Mark II" would logically indicate a previous model existed .)
http://philadelphia.craigslist.org/
Damien Roohr
Canton, CT
1978 Comp GS under restoration!