Hi. According to Henderson and Benjamins' Guide to Gas Pump Restoration book. pages 166-167:
1920 to 30 Red Pump with Blue top and beltline area (Regular Grade)
1926-30 Solid blue pump with White Eagle decal centered onlower door (Preminum Grade)
1930-32 Solid White with red base, top and belt line (Regular Grade)
1930-32 Solid white pump. White Eagle rectangular decal 10" below belt line (Premium Grade)
I think the book is available through this website.
Alex
[This message has been edited by Alex (edited 04-28-2007).]