Lot
2427 
1893, 4¢ Columbian, blue color error, o.g., centered slightly into design at left, rich intense true blue color, two tiny thins, Fine appearance; with 2020 P.S.A.G. certificate.Scott No. 233a $18,000.
A RARE MINT ORIGINAL GUM EXAMPLE OF THE 4¢ COLUMBIAN ERROR OF COLOR.
The 4¢ Columbian color error was a result of using the blue ink intended for the 1¢ Columbian value. At least two sheets where printed coming from plates D17 and D18 (the plate numbers from these sheets still exist) with very few examples, both mint and used, surviving from these printings.
Realized: $2,900