The first U.S. 930 (9306800011) was featured in a recent Excellence magazine article. Silver with red tartar interior that appeared on two covers of Road and Track. May have been a preproduction car, page 49 – Ferrari Chat:
930 Turbo Carrera - Page 49 - FerrariChat.com
In addition to 3 liter 930’s and 928’s, there’s a possibility that there are preproduction 3.3 930’s as well (small turbo badge, different tach, etc.):
1979 Porsche 930 (...and 78's too!) - Page 17 - FerrariChat.com
Preproduction 928’s on Rennlist:
#1:
Early Porsche 928 restoration - "Number One", Preproduction Press Car (#1RC) - Rennlist Discussion Forums
#6
'77 ('78) Porsche 928, "Number Six", Preproduction Press Car (Updated 10-21-12) - Rennlist Discussion Forums