PE = Pioneer Era [1893-1898]
postcards with no pictures. Any pictures were hand illustrated, not
PM = Private Mailing card [1898-1901]
gave permission to private printers to print and sell postcards with the
inscription “private mailing card”.
UB = Undivided back [1901-1907]
correspondence had to be written on the front of the card, not being allowed to
have a divided back.
DB = Divided back [1907-1914]
Left side was for messages, the right side for addresses.
WB = White Border [1915-1930s]
printed in tinted half-tones partially for style, partially due to ink
shortages at the end of WWI. The white border gave more leeway when cutting
down the postcard sheet.
LE = Linen Era [1930-1944]
Printed on a linen texture paper, using brightly colored
CE = Chrome Era [1945 – current]
are known for high photo quality and true living color. They generally have a