Thanks for the link, J-C. I'd stumbled onto this awhile back when I was surfing the Net during a "Briscoe" craving. Recently, someone on the DS Forum posted that a kinescope episode of "Days" featuring Don as Tony Merritt exists (circa summer of '66), if not the entire "Days" series from 1965 to the present. As Days is filmed on the West coast, that may explain Don's "tanned surfer" look in the photos. An early holiday treat!
Now I'm waiting to catch Don's brief cameo on an "I Dream Of Jeannie" episode (soon to be aired on TV Land).