Identifying Autopens
As Glenn has been a prolific hand signer since the earliest days of the space program Autopen signature examples are not common. This makes it difficult to identify definitive patterns, so the information below should be considered provisional.
This AP pattern may have been used as early as 1969, and from time to time during Glenn's Senatorial career.
This pattern was used on STS-95 crew-signed pieces.
Two examples of pre-printed Glenn signatures on commemorative covers are shown below.