There are 11 Monocoupe 90 aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top. The ones listed here were built between 1930 and 1940.
N19438
1940 Monocoupe 90
Ellerbe, NC
N12361
1933 Monocoupe 90
Cedar Park, TX
N116V
1932 Monocoupe 90
Rhinebeck, NY
N119V
1932 Monocoupe 90
Saint Louis, MO
N429N
1932 Monocoupe 90
Rhinebeck, NY
N557W
1931 Monocoupe 90
Fort Ogden, FL
N520W
1930 Monocoupe 90
Lomita, CA
N537W
1930 Monocoupe 90
Sitka, AK
N543W
1930 Monocoupe 90
New Market, VA
N176K
Monocoupe 90
Sitka, AK
N538W
Monocoupe 90
Casper, WY