I thought the framed glazing was of the (rather large) canopy. And if it's German those aren't necessarily radials, the Jumo 211 and 213 looking like radials (save the exhaust ports) due to the use of an annular radiator and radial-type cowling. (with a couple exceptions, like the Ju 87, with a chin radiator Jumo 211)
And a bit late, but Graeme wasn't the Bristol 153 a single-engined fighter design?