Post navigation ← Previous Next → Certificate: 13 Colonies Special Event 2021, Clean Sweep! Posted on 22 July, 2021 by Brandon 8″x10″ 13 Colonies Special Event 2021 Full Sweep Certificate for working all 13 states plus bonus stations TM13COL in France, GB13COL in UK and WM3PEN in Philadelphia. Many thanks to all the folks who made this event possible!