Super XX was around in the 50's. I don't think it made it to the 60's.
I don't know if it went as far back as the 30's. The only lab I can
think of that MIGHT be able to handle it is Rocky Mountain Film Labs at
Don't even THINK of bringing it to any other lab. The usual lab can't
even deal with black and white or slides, much less something like
this. I don't know what Rocky Mountain will charge or even if they can
do it, but the website tells you how to contact them so I'd go there