Following the E-Type Series 1 there was a series of cars built in 1967–68, unofficially called "Series 1½." Due to American pressure the new features were not just open headlights, but also different switches, black plastic rocker switches, ribbed cam covers painted black except for the top brushed aluminum ribbing, hood frames on the Roadster that have two bows, and other changes.

Series 1½ cars also have twin cooling fans and adjustable seat backs.

Series 2 features were gradually introduced into the Series 1, creating the unofficial Series 1½ cars, but always with the Series 1 body style.

A United States federal safety law affecting 1968 model year cars sold in the US was the reason for the lack of headlight covers and change in dash switch design in the "Series 1.5" of 1968.

An often overlooked change, is the wheel knock-off "nut." US safety law for 1968 models outlawed the winged-spinner knockoff, and any 1968 model year sold in the US, or earlier German delivery cars, should ...