There are 18 designs of indicia whose face value is six cents. Seven of these designs are distinctive enough that they can be identified by examining the images immediately below. The remaining 11 designs feature a bust of Abraham Lincoln (4 designs), a bust of George Washington (5), or a large numeral inside an oval (2).
   For a key to the Lincoln designs click here.
   For a key to the Washington designs click here.
   For a key to the large numeral designs click here.

Statue of Liberty head	design U107	You have identified design #U107, printed in light green on white paper and diagnostic for Scott #U551,or printed in dark gray-green on white paper and also diagnostic for Scott #U551a.
Moby Dick	design U108	You have identified design #U108 diagnostic for Scott #U554 (printed in blue on white paper).
White House Conference on Youth	design U109	You have identified design #U109 diagnostic for Scott #U555 (printed in light blue on white paper)
Non-profit Organization	design U155	You have identified design #U155 diagnostic for Scott #U609 (printed in green-blue on white paper)
single-propellered airplane	design UC2	Design UC2 Scott Equivalents printed in orange on white paper Scott # DIE REVALUED UC3 2a UC4 2b UC5 2c UC6 3 UC10 2a revalued to five cents UC11 2b revalued to five cents UC12 2c revalued to five cents UC13 3 revalued to five cents UC27 2a one cent surcharge UC28 2b one cent surcharge UC29 2c one cent surcharge
DC-4 Skymaster	design UC3	You have identified design #UC3 printed in carmine on white paper and shared by Scott #s UC18, UC20a (erroneous six-cent revaluation), and UC30.
flying eagle	design UC6	You have identified design #UC6 printed in red on white paper and diagnostic for Scott #UC25.

long	design U26	Design U26 Scott Equivalents Scott # color envelope U85 dark red white U86 dark red amber U87 dark red cream U85a vermilion white U86a vermilion amber U87a vermilion cream
short	design U48	Design U48 Scott Equivalents Scott # color envelope U181 red white U182 red amber U183 red cream U184 red fawn U181a vermillion white U182a vermillion amber U183a vermillion cream

long	design UO11	Design UO11 Scott Equivalents Scott # color envelope UO23 dark red white UO24 dark red cream UO37 vermilion white UO38 vermillion cream
short	design UO20	You have identified design #UO20, printed in red and shared by Scott #s UO56 (white), UO57 (amber), and UO58 (cream).

yes (go to Question 2)	design U6	design U12
no (go to Question 3)	design U14	design U21	design U93

yes	design U12	You have identified design #U12, printed in red and shared by Scott #s U30 (white) and U31 (buff).
no	design U6	You have identified design #U6, printed in red and shared by Scott #s U11 (white) and U12 (buff) or printed in green and shared by Scott #s U13 (white) and U14 (buff).

yes (go to question 4)	design U14	design U93

no

design U21

You have identified design #U21, printed in pink and shared by Scott #s U62 (white) and U63 (buff) or printed in purple and shared by Scott #s U64 (white) and U65 (buff).

yes	design U14	You have identified design #U14, printed in pink and shared by Scott #s U38 (white) and U39 (buff).
no	design U93	You have identified design #U93, printed in orange and shared by Scott #s U529 (white paper; die 7), U530 (amber; die 7), and U531 (blue; die 7).

91/2 mm	design UO3	You have identified design #UO3, printed in black on lemon paper, and diagnostic for Scott # UO4.
101/2 mm	design UO6	You have identified design #UO6, printed in black and shared by Scott #s UO12 (lemon paper) and UO13 (white).