Joined: Jan 2009
Posts: 44,049
Likes: 6,251
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
It looks like an English three-speed frame that came originally with 26" wheels.
If you're running a freewheel rather than fixed, you deserve a rear brake. A single brake isn't enough.