It isn't surprising that these two superb diecuts ended up together in a paper bag as described by the seller, as they were sold as a set. Beistle sold these as enveloped sets, with the envelopes having a number of variations. (The orange envelope is earlier.) They were marketed as Mechanical Hallowe'en Silhouettes and sold in the early 1920s. Somewhat later, the owl was made as a table decoration with a flip-out base.
Mark B. Ledenbach's vintage Halloween collectibles blog.