That is the original MK1 if you like, as the Mark II has Competition GS mk II written on the top tube, i just picked one up from 1982 last year in Black in a tall guy size, it rides fantastic, i really like it and have no plans to sell it, i paid $500, and mine came with a NR campy rear mech ( they were specced with Gran Sport) but he upgraded from new, i also got the original bill of sale the owners manual and two sets of pedal cages and nary a scratch on it... what a lovely bike...
G