There are 7 Grumman HU 16E 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 1951 and 1957.
N29853
1957 Grumman HU 16E
Wilmington, DE
N125FB
1956 Grumman HU 16E
Perry, MO
N226GR
1954 Grumman HU 16E
Warrenton, VA
N113FB
1953 Grumman HU 16E
Perry, MO
N122FB
1951 Grumman HU 16E
Perry, MO
N115FB
Grumman HU 16E
Cape Coral, FL
N868KG
Grumman HU 16E
Leesburg, VA