Hi!
Estonian Author Hendrik Arro - himself a 3./NSGr 11 Ar 66 pilot - wrote many articles and book(s) about Estonian Luftwaffe pilots.
In one book at least he writes also something about Latvian NSGr 12 and gives a book as source:
Latviešu lidotāji otrā pasaules karā
(Latvian flights in World War II - google translation)
Seems a 1993 edition of this book is on internet in pdf-format:
https://dom.lndb.lv/data/obj/file/17845102.pdf
I know only one word of Latvian (saldejums = ice cream) so don't ask me for translation. The pdf text can be copied and pasted into google translation or somesuch mangler.
Below is one photo of Erg.NSGr. Ostland Ar 66 on it's nose in Libau. I have no further data. Photo is from Eesti Sõjamuuseum collection (F47 Remi Milk, A
lbum. Eesti lendurid Saksa lennuväes ja 20. eesti SS-diviisis, KLM ET 1555:7 F47).
https://www.muis.ee/digitaalhoidla/a...3-0cee66f814c6
Bigger photo (.tif) downloadable here:
https://www.muis.ee/digitaalhoidla/a...6-eff382225b79
I think this photo has appeared in some Barry Rosch's Lw codes book earlier? There was another of Estonian manufactured PTO-4 in Lw use with 6x something x code, too??).
Milk was trained by Estonian Air Force, not by Luftwaffe and has apparently got the photo from some Estonian comrade of his. At the moment cannot find any other related photos.
Cheers,
Kari