Many thanks to SWLing Post contributor, Dan Greenall, who writes:

Hi Thomas,

In 1976, amateur radio operators in the United States were allowed the option of using a special prefix in place of their regular one to celebrate the country’s bicentennial year. Many amateurs issued special QSL cards for this bearing the new prefix, making reference to the US bicentennial year on the front.

Others simply modified their existing cards. The bicentennial commissions in Massachusetts and South Dakota even made up fill-in-the-blank commemorative QSL cards.

WL1CEN was a special events station in Lexington, Massachusetts, that appears to have been operating earlier in 1975.

The American Radio Relay League also issued a bicentennial WAS award to amateurs making contacts with all 50 U.S. states during 1976.

Here is a link to more bicentennial QSL’s

https://archive.org/details/ac-2-ghk-4-front

I wonder what’s going on this year, as I am not QRV at the moment?

73

Dan Greenall, VE3HLC