Strange.
It appears to have been destroyed in 1991?????
http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=122BA
Deregistered Aircraft 1 of 1
Aircraft Description
Serial Number SEM122 Type Registration Corporation
Manufacturer Name SEMCO BALLOON Certificate Issue Date 04/22/1974
Model T Mode S Code 50055472
Year Manufacturer None Cancel Date 04/08/1991
Reason for Cancellation Destroyed Export To None