There are 5 Grumman Aircraft Eng C-1A 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 1955 and 1957.
N27PH
1957 Grumman Aircraft Eng Corp C-1A
Anchorage, AK
N189G
1955 Grumman Aircraft Eng Corp C-1A
Oklahoma City, OK
N475AM
Grumman Aircraft Eng Corp C-1A
Santa Rosa, CA
N71456
Grumman Aircraft Eng Corp C-1A
Scottsdale, AZ
N7171M
Grumman Aircraft Eng Corp C-1A
Reno, NV