Double Dippers

I've noticed that some pen designs are available with different designs inside the pen on the text pannel. The floating part and background of the pen is the exactly same. Here are some of them from my collection. Do you know of any others?

Mammoth Cave Kentucky
This design is also available with a caption panel that reads, "Caves & Caverns Natural Wonders".

I found this same butterflies pen with a back panel that says, "BUTTERFLIES" and "Smithsonian Institution National Museum of Natural History".

This "Up, Up, and Away" pen can also be found with text that reads, "Albuquerque"

This roadrunner is a busy fellow. He runs in both Arizona and New Mexico's pens.

The same crowd cheers for the Wisconsin Badgers and Marquette Golden Eagles. Good thing they are both in Wisconsin.

Know of any others? Do tell!

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