Census of 1c Blue Green, Vertical Coil (Scott 316)
- RAS 1981 Rarities - $5,750
- RAS Sale 1150, 3/1/2017, lot 972
- PFC 58276 “Genuine, small tear in R. margin of B. stamp, pinhole in L. margin of T. stamp”
- PFC 542082 (2017) "Genuine, previously hinged, the top stamp with tiny pinhole at upper left, the bottom stamp with a small tear at right"