I have a 16 ga. shotshell that is all 100% clear plastic including the head. The only metal is the brass battery cup with a nickeled primer. The headstamp is “METEOR 16 16 P (or R) A C” It has a rolled top wad crimp. The top wad is tan with no markings. It is 2 1/4 inches long.
I have had this cartridge since the late 1960’s or early 1970’s. I would guess it was made in the mid-1950’s.
Does anyone have an ID and what other gauges were made?
Here is a poor image. It is the best I can do.