Hey
@12boy , that looks identical to my Special from the early 80s. Mine has the rear brake 'boss' mentioned by
@Dave Scrimshaw, and the same band-on shifters on the downtube. I don't recall any 'Special' lettering on the toptube, but that area is covered by a sportive sticker on my frame so I can't easily check.
For what it's worth I love the frame and it seems to be a competent performer that I have no current intention of replacing. I use it on my daily commute, leisure rides, occasional charity rides and "Friday Night Rides to the Coast", plus it scored my one and only Strava KoM on an offroad woodland track (long since lost).
My only complaint would be an alarming shimmy on some fast descents, but that goes away when I shift my weight.
EDITED to add... Don't all bikes do that?