The advanced aerodynamics increased pilot fertility to such an extent that 50% of the post war baby boom can be traced to these drop tanks, I saw it in a Youtube video about lies an stuff.
The stamped & drawn sheet metal hanger fittings (aka supports) on your DT look the same as those used on some (early?) 75 USgal DT. The filler tube is located closer to the nose than on the later US 75 USgal DTs I am familiar with.
There were some early 75 USgal DT used on the P-51/A-36 (with a similar filler tube location) that were constructed using two stamped & drawn half-shells for the tank body with the visible projecting seams. Here are 2 pictures of the tank on an A-36A in Italy - note the similar stress marks in the shell body just behind the filler tube. The difference I see here is that the tank has cast hanger fittings.