I have a more precise mix, but you can get pretty darn close with the colors below, plus a little black:
https://www.bikeforums.net/classic-v...ste-match.html
I had my match scanned and it came out close. Here's the mix:
Nason Ful-thane single stage IS
Spectramaster
code GS334
Tinting guide: for 16 oz:
430-03 H.S. White 137.3
430-07 Ochre 171.5
430-11 Green 195.9
430-02 Carbon black 203.7
435-82 Nason 2.8 VOC SS binder 486.8
441-21 Medium ful base redu 528.5