Unknown Piatnik deck - can anyone confirm if this is a genuine 1930's deck?

[unkowncards]

Here's a sample of the cards: (I don't have a full deck, about 39 of them)
https://imgur.com/c9pxaGo

Here's what I've been able to dig up about them.

They are a Ferdinand Piatnik & Sohne A.G. deck, meaning they were probably printed sometime after 1917 and sometime before 1939. It is an Industrie and Gluck style deck, and the designs are consistent with late 1920s and early 1930s Piatnik decks.

However

I have a nagging feeling that these might be a rerun/reprint. I'm not even sure if they did those, but here's my concerns:
1. They were found with items that were mainly from the 60s/70s, with the oldest item besides these being from 1936.
2. They seem more detailed and more colorful than any confirmed 1930s deck I can find on the internet. There are some minor differences too, like the Joker's mouth being closed (while on confirmed decks they seem to have an open mouth) and the horse logo being in color (while on most decks it seems to be in black and white.
3. I can't find the card backing on any other deck on the internet.

I would be really grateful if anyone could help me figure this out. Thank you!