Its a mk2 burner, but the higher end models had the carbospec frames instead of lead ones.
Aero pro it ain't..
Pretty good frames tbh, not everyones cup of tea, due to being a burner, personally, i'm unbiased to the Notts offerings.
I think, but am not 100% that the carbospec frames were made in Japan. Sure a Burner specialist will be along in a bit.
MM