These four are listed in Hake as numbers 2007, 2011, 2012 and 2017. The shield design is scarce with Hake 2004 revised value of $143. Together 2004 values totaled $226. The top two in photo have metal backs. First has trivial surface wear in reflected light. Second has couple raised cello bumps that catch light. Both totally clean and glossy. The bottom two are cardboard backs with ink stamp of 1950s campaign item dealer Samuel Hoffman of Philadelphia. The red rimmed one is just a hair off-center and tiny dot on top edge barely visible. The shield design has very tiny mark on lower blue panel showing only in reflected light, but overall exceptionally clean and N. Mint.