There are 8 Porterfield 35-70 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 1935 and 1976.
N17040
1976 Porterfield 35-70
Gilroy, CA
N17038
1937 Porterfield 35-70
Independence, OR
N17026
1936 Porterfield 35-70
Urbana, OH
N17029
1936 Porterfield 35-70
Bellevue, WA
N326GH
1936 Porterfield 35-70
Oklahoma City, OK
N14481
1935 Porterfield 35-70
Winnemucca, NV
N16495
Porterfield 35-70
Lincoln City, OR
N17490
Porterfield 35-70
Baldwin Park, CA