Hi foliks, what are the earliest uses of Phillips-head screws in the Jaguar lineage? These heads provided much quicker centering for screw attachment than standard slot screws. They became practical as machining capabilities improved in the 1920s but I think were not widely adopted in European arena until after 1945.
The Mark V has at least 3 Phillips-head screws as original. They are on the electric motor casing (attached to the wiper transmission case) of the Lucas windshield wiper assembly. Date on one in my garage is March 1950.
What is the earliest factory use of Phillips-head screws on the cars to your knowledge?