Here is a block of 8 of #176c Triple surcharge had i got many years ago. Just today i looked at it one more time and saw what i never saw before. The stamp on the top right shows the upside down '1' in the 1920's. You also see in the top middle stamp and the bottom left stamp the print stop that looks like a 'E' backwards after the 1920. You also see a little bit of that in the bottom right stamp showing in front of the 1920. I saw those but never saw the upside down '1'. Anyone have anything to post on #176.