From the mid-1970ies on, several experimental schemes (eleven in total) were tested. The depicted scheme, made of an overall grey shade called Achatgrau ("agate grey") was applied to JG 71's F-4F 37+35 in 1976. Markings and stencils were similar to the earlier Norm 72 standard. This repaint was done utilizing the basic paint kit provided by Alphasim/Virtavia, massively improved by Steve "Duckie" Bryant under assistance by Gus Robatto.