There are 3 Hiller UH-12L4 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.
N90483
1966 Hiller UH-12L4
Kingman, AZ
N90487
1966 Hiller UH-12L4
Firebaugh, CA
N90457
Hiller UH-12L4
Laveen, AZ