I have come across a bike which I suspect is a an Orange Formula, anyone got any tell tale signs that it’s actually a formula. I have heard they are quite rare, any truth to this?
I have had a look and I am not sure if it is a genuine formula. Looks more like a prestige. The serial starts A891 which is confusing as I thought it was year then month, unless this means January 1989. Any frame number experts on here?