I own an early 1970s Coventry Eagle road bike and my rear derailleur broke (an old simplex that probably came with the bike some 35 years ago) and i've narrowed it down to campagnolo and shimano, I'm leaning towards campagnolo only because British bike manufacturers never used shimano in the 70s.

what's your take?

i've narrowed it down towards a shimano 600

or this one.

http://cgi.ebay.com/CAMPAGNOLO-REAR-...#ht_1276wt_898

I also dont have much to spend either -.-