BENZING, Joachim Clarence

STAMPS BY YEAR

1908
United States, Definitives, lettering on 4c, 5c, 13c, 50c and $1

1909
United States, Abraham Lincoln centenary, lettering only

1912
United States, Parcel post postage dues, frame and lettering of 1c and 25c 

1913
United States, Panama-Pacific exposition, lettering on 2c

1922

United States, Definitives, frames of all values except 1.5c and $5

1923
United States, Harding memorial, frame only

1925
United States, Lexington-Concord, vignette of 5c and all frames
United States, Norse-American centennial, vignette of 5c
United States, Definitives, frames only

1926
United States, Airmail, vignette only

1928
United States, Civil aeronautics, vignette of 2c

1929
United States, Edison's lamp, vignette and frame only

1930
United States, Charleston settlement, vignette only
United States, Graf Zeppelin, vignettes of 65c and $1.30

1931
United States, Surrender of Cornwallis, lettering only

1932
United States, George Washington, vignettes of 0.5c, 1.5c, 3c and 4c

1933
United States, Chicago flight, vignette only
United States, Byrd expedition, vignette only
United States, Kosciuszko, vignette only 

1934

Canal Zone, 20th anniversary of opening of Panama Canal, vignette only (1)
United States, Maryland, vignette only
United States, Mother's day, vignette only
United States, National Parks, vignettes of 1c, 3c and 7c

1935
United States, Connecticut Tercentenary, vignette only

1936
United States, Women's suffrage, frame only

Notes:
(1) Collecting by engraver - Stampcommunity website