Here is a less common pair of insulators -- actual postage additional:

CD 154 DOMINION-42 // "D in a diamond" -- RDP -- great peach! Minty! -- $18 (SOLD)

CD 134 HEMINGRAY-18 / 0_4:: // MADE IN U.S.A. / 3 -- RDP -- just a tiny peck from Mint -- I've always loved this insulator - newer manufacture of an old style -- $15 (sold)