Purchased this last week and just got it,I got it because the 1C is larger than the 554c 2c even by the naked eye so I bought it with the 1 in a million chance it was a 596,now I'm more puzzled,it is 22.35MM high,isn't that quite long for a flat plate,this doesn't look like the pictures of the 596's on Siegel's website,looks flat plate but has rotary signs also.
UPDATE
********************************************************************************************
I removed it from the postcard,it is a flat plate 552,so for reference to anybody a 552 can be 22.35MM in height,I have one right here.*************************************************
