This set of six Dennison owl cut-outs was sold in a glassine envelope for a single year, 1922. For that year, the stock number for the set was H-48. Beginning in 1923, the same cut-out in the same quantity was sold in a slide box with a different stock number, H-99. Subsequently, I’d say this glassine envelope form of packaging would be significantly harder to find than the slide box packaging. You can’t go wrong with the seller, one of the finest purveyors of vintage Halloween on eBay.
04/23 Update: This sold for a relative bargain: $128.50.