Hello Peter,
Thanks for the note on the serial number.
42-25531 in the P47 Thunderbolt Database (
http://pagesperso-orange.fr/p-47.database/index.html ) has Kelley's a/c as 43-25531 which it says was 63rd FS "UN-A" and then "K" original pilot Barny P. Casteel then MACR8996 18/09/1944 pilot Robert G. Kelly and it seems this is backed up by a photo.
While 42-25531 is noted as with the 356FG 360FS as "PI-T" "Judy" pilot Philip E. Tukey jr.
However I checked in Footnote and MACR 8996 has a definite typed 42-25531 in the report for Kelley. So the P47 Thunderbolt Database seems to hold errors.
All for now
Alex