U.S. Scott # U 471e6, 1920-1 2c on 3c (U439c) Washington, dark violet on blue, Die 6 - Type 4/Type 2 Double Surcharge Error - Mint Cut Square (See Warranty)
This is a Type 4/Type 2 Double Surcharge, but not on Die
1, as listed in Scott. It's Die 5, from UPSS #3058. This  Â
error exists on Dies 1, 5 and 6. This is Die 5.