This 1981 Pro Arts poster is often touted as being one of the rarer posters from the company and it does appear to be only showing up from time to time for sale on Ebay.
I remember Brian best from his work on the series The Misadventures of Sheriff Lobo (later changed to just Lobo) which ran on NBC from 1979 to 1981. The series was a spin-off from the popular series B.J. and the Bear (1979-81) starring teen idol Greg Evigan. Kerwin began his acting career on stage and eventually moved on to appear in numerous television series and movies as well as feature films.
In February of 2016, Kerwin’s wife, Jeanne, passed away after a three year battle fighting brain cancer. The couple had been married since 1990.