What about previous one(s) in the 40th line? Others in the past? And, why blue? Some do note minute details but, don't know if of any significance.
Being a military vehicle, could be something different divisions did. Didn't JL have a W/L that had WL in serial # and that was the W/L or also included, in their military series?
I know one that is well versed in 1:1 jeeps, will have to ask him about blue radiator cap.
I like Rat Patrol Jeep and Scrambler.