There are 28 Piper L-21B 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 1952 and 1987.
N87876
1987 Piper L-21B
Beverly, WV
N986CK
1983 Piper L-21B
Conifer, CO
N10365
1954 Piper L-21B
Beaver Falls, PA
N13824
1954 Piper L-21B
Sunnyside, WA
N1383W
1954 Piper L-21B
Anchorage, AK
N1421B
1954 Piper L-21B
Shady Cove, OR
N200FG
1954 Piper L-21B
Port Orange, FL
N2621K
1954 Piper L-21B
Peoria, AZ
N26AC
1954 Piper L-21B
Middletown, DE
N3020F
1954 Piper L-21B
Moxee, WA
N3930L
1954 Piper L-21B
Port Alsworth, AK
N3VU
1954 Piper L-21B
Indianapolis, IN
N753AT
1954 Piper L-21B
Hood River, OR
N8516P
1954 Piper L-21B
Brandon, MS
N87869
1954 Piper L-21B
Dunn, NC
N50084
1953 Piper L-21B
Reading, PA
N777HV
1952 Piper L-21B
Crown Point, IN
N135PC
Piper L-21B
Hood River, OR
N3021L
Piper L-21B
Greenfield, IN
N3267P
Piper L-21B
Curtis, NE
N3907E
Piper L-21B
Craig, CO
N40368
Piper L-21B
Mansfield, TX
N666WR
Piper L-21B
Manalapan, NJ
N8056W
Piper L-21B
Greenfield, IN
N87928
Piper L-21B
Iowa Park, TX
N87930
Piper L-21B
Fort Worth, TX
N99323
Piper L-21B
Greenfield, IN
N9979D
Piper L-21B
Deshler, OH