Census of 50c Perf 10 at Top or Bottom (Scott 517c)

Notes:

Provenance:

4/10/2001, Twigg-Smith Collection, Siegel Auction Galleries, The Thurston Twigg-Smith Collection of Superb Used U.S. Stamps, Sale 835, Lot 489, Realized $15,500
9/20/2012, Natalee Grace Collection, Siegel Auction Galleries, The Natalee Grace Collection of Used U.S. Stamps, Part Three: 1902 and Later Issues, Sale 1028, Lot 438, Realized $15,500
2/15/2015, Bakwin Collection, Matthew Bennet Auctions, Realized $16,000

Certificates:

APS (1984)
PF 371865 (2002) Genuine, perf 10 at top
PF 507542 (2012) Genuine, transitional perforations at top, perforated 10 at left to perforated 91⁄2 at right