Lenticular Postcards copyright 1950s. I nitially reels did not come in sets of 3 but were single reels within a sleeve like an old 45rpm record that had a hole in the middle in order to read the info on the label. A typical complete reel set or packet consisted of an outer envelope as well as inner sleeves containing 3 reels . The packets also included a booklet beginning approximately in 1962. Full value is only accorded to complete sets.
Many collectors consider incomplete packets or single reels of little or no value.
These designations are necessary since many reels were issued more than once with outer envelope package variations. After 1982 packaging changed from envelopes to cards and so there exists no designation for the Tyco series. Sets were reissued many times under new envelope packaging upon the several changeovers of company ownership. DR Demonstration Reels often included with a viewer. RP Plastic Cannister sets SAM Adventure of Sam Sawyer, an advertising character created by Swayer's SP Site-specific reels sold at or near the attractions pictured or by local distributors.