Colnago Precisa straight -- when was it introduced?

[wassertreter]

Slowly starting to look around for parts to build up my Colnago Master Piu. Period correctness would be great, if it's not all too expensive, so I'm wondering, when the first year of the straight chromed Precisa forks might have been. (Campagnolo Record) 7 speed or 8 speed era? Many thanks.

 

[LML999]

1990, I believe. My 1989 Spiral Conic had a curved fork; the 1990 had a straight fork...

 

[wassertreter]

Cheers LML