The rear dropouts are exactly like those on my 1960s frame that I believe is a Falcon (missing headbadge, but the head tube holes are an exact fit for Falcon headbadge). I think they were made by Cyclo. I can't see your front dropouts very well, but those look like what's on my frame too. I'm not saying your frame's a Falcon, just that the dropouts are definitely from that era. Cut from plate, thicker than what's on bike boom bikes (that people call "stamped" dropouts). They are stamped to offset the rear fender eyelets, but I think the basic process is to cut them. Nice frame -- who cares if it's a Hetchins . . . really? What size seatpost does it take? My Falcon is quite heavy, not double-butted tubing, but I really like it as a built-thing anyway.