Need help with original air filters

[Ls6 Ragtop]

Hello Michael,
The filters you have are the performance version of the A212CW filter that was used on many Chevrolet V-8 applications with the open element and cowl induction air cleaners from about 65-72. Although a pretty cool novelty item, it saw no production usage that I know of.
It's value is hard to predict as it falls under the aftermarket catagory. Some day 2 guy that's going for a certain look could have interest in it.
Hope this helps, Chris