Seeking info. on P-47 pilot and group/squadron

[KM1957]

I can not get the serial on T5-L in a resolution to see very well; if someone has a better "view", I may be able to track it down. Looks like 42-25??? to me, but don't want to assume anything. Same on the 42-76"459" ship. I have that serial as K4-V with the 511th Fighter Squadron as mentioned above. If someone can get a better look, it may help. I have quite an extensive listing for 9th AF aircraft, but the 50th Fighter Group is a tough one to find information on.

Kent