STAMPS BY YEAR
1912
United States, Parcel post, lettering on 20c, 75c and $1
United States, Definitives, frames of 7c and 9c
1922
United States, Definitives, lettering on 14c
1926
United States, Airmail, lettering on 15c and 20c
United States, John Ericsson, lettering only
1927
United States, Burgoyne campaign, lettering only
1930
United States, Charleston settlement, lettering only
United States, Postage dues, lettering on all cents values
1931
Canal Zone, Airmail, frame, lettering and numerals
1932
United States, George Washington, lettering on 4c
1933
United States, Byrd expedition, lettering only
1934
Canal Zone, 20th anniversary of opening of Panama Canal, frame and lettering (1)
Notes:
(1) Collecting by engraver - Stampcommunity website
1912
United States, Parcel post, lettering on 20c, 75c and $1
United States, Definitives, frames of 7c and 9c
1922
United States, Definitives, lettering on 14c
1926
United States, Airmail, lettering on 15c and 20c
United States, John Ericsson, lettering only
1927
United States, Burgoyne campaign, lettering only
1930
United States, Charleston settlement, lettering only
United States, Postage dues, lettering on all cents values
1931
Canal Zone, Airmail, frame, lettering and numerals
1932
United States, George Washington, lettering on 4c
1933
United States, Byrd expedition, lettering only
1934
Canal Zone, 20th anniversary of opening of Panama Canal, frame and lettering (1)
Notes:
(1) Collecting by engraver - Stampcommunity website