That pretty much covers it SS, we have three huge CBI/AVG books in the factory, packed full of photos, the one certain rule the photos prove is there weren't any rulesno set rules above and beyond squadron patches on the left chest for fighter groups. for bomb groups the general rule was the squadron patch on the left chest, and if at all, the group patch on the right chest. hq meatball on the left shoulder [though i have seen them on the right] and the shield on the right. originally, blood chits of the leather type, [chinese flag and a little later in combination with a us flag, and written in chinese, return this ally...] were worn on the back of the jacket. it was determined at some point that the blood chit on the back made a downed airman an easy target, so silk, cotton, and sometimes blood chits, and or flags were sewn into liners . some on the inside back, some left front, some right front on the inside liner. some were sewn in the liner only, others were sewn right through the liner and leather shell. however, i have seen all kinds of variations.
That would be more AVG era. Earlier... nothing, but later as can be seen in above pic, squadron patch on left breast. And also leather blood chit.Thanks for all the info!! I was thinking more along the lines of what they wore on M-422 jackets.