Thanks for the reply. I've seen both, as in this photo showing a D, https://commons.wikimedia.org/wiki/File:194th_Fighter_Squadron_-_North_American_F-51D-30-NA_Mustang_44-74825_Treasure_Island.jpg
Does look painted tho, as no color difference in the stainless steel panel under the exhaust. There are many pictures of F's on the line in front of the Hayward hangar. https://commons.wikimedia.org/wiki/File:F-51H_194th_Fighter_Squadron_(4777706358).jpg
Cheers,
Bill