JohnB wrote:
It is a three owner ship: the Navy, they firm that bought it surplus for firefighting but never converted (or even flew?) it, and the current owner.
I also understand it is (maybe?) the last PBY built.
It was indeed the last Catalina built - a PBY-6A by Consolidated-Vultee at New Orleans. Here is its post-US Navy history ...
....originally intended for the Smithsonian Institution’s NASM collection but not considered ‘representative’ of type so donated by NAS Litchfield Park to Florida Board of Forestry, Florida Forest Service, Tallahassee, FL 06Jan61 with CofR as N9825Z 18Aug61 quoting ‘serial number 235’; conv to waterbomber and Restricted CofA issued 02May63; to Robert P and Claudette R Schlaefli (SLAFCO), Port Orchard, WA 25Apr73; allocated Tanker code ‘158’ but probably not used; ownership changed to The Schlaefli Charitable Remainder Unitrust, Moses Lake, WA 01Jul98; to Frederick C Peterson, Issaquah, WA 08Oct99 with CofR 22Feb00; remained at Moses Lake under restoration to 1945 configuration and extant 2021.