Casper the Friendly Ghost : 1991 Halloween

1991-Oct-31 Casper WY pictorial postmark

Casper the Friendly Ghost is a fictional character who appeared in animated short films produced by Paramount Pictures' Famous Studios. He is a translucent ghost who is personable and keen to socialize with living beings, much to the chagrin of his three wicked uncles, the Ghostly Trio. 

The character was featured in 55 theatrical cartoons titled The Friendly Ghost from 1945 to 1959, and has been featured in comic books published by Harvey Comics since 1952. The origins of Casper are disputed, with both Seymour Reit and Joe Oriolo claiming to be the character's creator. 

Casper is a city in, and the county seat of, Natrona County, Wyoming, United States.  Casper is nicknamed "The Oil City" and has a long history of oil boomtown and cowboy culture, dating back to the development of the nearby Salt Creek Oil Field. The city was established east of the former site of Fort Caspar, in an area that grew for European settlers during the mid-19th century mass migration of land seekers along the Oregon, California, and Mormon trails