[Doug Stankey]

OK, here goes......

25+D37 on a Ju86 - belongs to 7./KG 152. The code is also associated with II.(K)/LG.

or how about:
2L+D21 on a Do 17E - belongs to II./LG 1. See Taghon to confirm this code.

or how about:
2L+W40 on a Ju 52 - this is a Stab IV./LG 1.

or:
"dot" 04+01 on a Ju 52. - This is aircraft "01" of K.Gr.z.b.V. 4 (first formation) from the Sudeten crisis of 1938. Also seen:"dot" 08+14 on a Ju 52 which of course is aircraft 14 of K.Gr.z.b.V. 8 (first formation).


Regarding:
03+F30 on a He 51.
07+A16 on a Ju 52
Well, I still haven't solved these. Typically, the first digit is the Luftkreis number, in the case 0= East Prussia. So the He 51 might be from Stab III./J.G. 130 in the 1935 period, similar to 21+E21 for J.G. 132.

One that has driven me crazy for 35 years is the well seen:
27+E11 on a Ju 52 bomber - Some books claim it is KG 152, but I think this is unlikely. (It used a 25 code). Possibly K.Gr. z.b.V. 172.


I have more odd-ball prewar codes to vex you if you like.