MGZ 34 Lens Filters

[dogman5]

I was looking at a friends collection recently and saw that he had two lens filters in the case for his MGZ 34. How rare are these? I have never specifically looked for them, but don't recall seeing any for sale separately. In a search I was able to find a set at The Collector's Guild.
https://www.germanmilitaria.com/Heer/ph ... 03881.html

Are they really worth 300 USD for the set? Any more info on these is very much appreciated. Thanks,
Brian

[42rocker]

Hard to find. As far as the price that does not sound high from what I remember seeing the last set sell for.
While I could use two sets I'm not ready to buy a couple of sets.

Later 42rocker