The catalog says the M69 is "Experimental". Are you sure that's what it says? The M68 was a 6" .38 Spl that was identical in appearance to the M66 only chambered for the .38 Spl instead of the .357 Magnum. It was produced for the California Highway Patrol from 1976 to 1983. The CHP stamp was overstamped OHB when sold to the public. They are kind of rare.
Post pictures and a serial number if you can.