sure has the look of Britain, but some peculiarities (like the weird placement of the cable guides) those are BCM head lugs and a Brit HS (we need Juvela to chime in about now) and I know that forkcrown is a known make but will have to research. Wonder if ALL the cable routing was done aftermarket, the under BB is a bit odd for what I think may be original build date...
Stronglight crankset?
Matthauser brake pads?