Census of 6c Perf 10 at Top or Bottom (Scott 506a)
Provenance:
- Siegel Sale 1192, 11/14/2018, lot 570 - $1,900 hammer
Certificates:
- PFC 79155 (1979) “Genuine, perf 10 at top, light creasing”
- PFC 525438 (2015) "It is genuine, with diagonal creases at top left and bottom"