Does the thickness of Anodizing not vary to the length of time left in the solution ??
I recall that GT's had some early anno frames - I may still have a period GT catalogue at my folks house.........
If it's powdercoat or paint then you'd be able to nick it somewhere obscure (side of BB covered by lockring for example) to tell
I recall that GT's had some early anno frames - I may still have a period GT catalogue at my folks house.........
If it's powdercoat or paint then you'd be able to nick it somewhere obscure (side of BB covered by lockring for example) to tell