Diecut Ashton Potter (as 5260) style, even but edges not vertical. Microprint USPS 1 mm wide (0.7 mm in 5260), legible but in different font. Also, USPS shifted to left of the flag seam. U in USA 0.3 mm thick as in original. Fecha (2018) gray.
Scott lists 41 different forgery types of this stamp.