There are 4 Bucker Jungmeister BU 133 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 1940 and 1941.
N133BU
1941 Bucker Jungmeister BU 133
Fredericksburg, VA
N133BJ
1940 Bucker Jungmeister BU 133
Michelstadt
N1940J
1940 Bucker Jungmeister BU 133
Monroeville, AL
N260
1940 Bucker Jungmeister BU 133
Prescott, AZ