I agree with Mick that it is a late 1950s or 1960s Hetchins with the Experto Crede lug pattern (my fav!) .. Looks like the mid-term, non-cast lug version.. The filets in the head lugs do appear to be where the lugs were "broken" to change the angle, although that frame appears to be a middle size range where that step might normally not be necessary.
Dale Brown cycles de ORO, Inc. 1410 Mill Street Greensboro, North Carolina USA 27408 336-274-5959 Fax 336-274-6360 <A HREF="http://www.cyclesdeoro.com">cyclesdeORO.com</A> <A HREF="http://www.classicrendezvous.com/main.htm">Classic Rendezvous</A>