There are 4 Weatherly 620 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 1980 and 1986.
N4623M
1986 Weatherly 620
Byers, CO
N4621A
1982 Weatherly 620
Neligh, NE
N9270W
1980 Weatherly 620
Bunn, NC
N9263W
Weatherly 620
Rochelle, IL