I honestly don't see your image examples as "low contrast" though...
I've found it develops great in Ifsol 3 at 4 or 4.5 minutes. The short dev helps keep down the base fog, and gives nice tones but as I said its high contrast being an aerial film.
But it's certainly GAF from... 1967 I believe. And I've found it's a really nice film. Funny anyone who "remembers" it says it wasn't a good film, but I find it a really nice film, so, maybe it's gotten better with age
Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1, 5DmkII / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic | Sent w/ iPhone using Tapatalk