Hallmark was founded in 1910 by teenage ... Ornaments that are most collected vary from different eras. The "Frosty Friends" ornament series is the longest running — 43 years.

Hallmark’s longest-running Keepsake series. These popular baubles featuring Frosty the smiling Eskimo and his polar pals date back to 1980. Muñoz once bought a single Frosty Friends ornament ...

"There's one series that's over 40 years running," he said, referring to the Frosty Friends from the Keepsake's line early days. "And there are some that Hallmark has an ornament for every year ...