My lovely bride and I came out west in the fall of 1966 and stopped, among other places, at the CRRM. Bob Richardson suddenly remembered he needed a picture of him showing someone a switch key, so he had me take one with his camera, as well as mine.
From the size of our kids, I would date this circa 1972 or 1973
Sine the mid-1970s, Lulu Belle has been renamed -- but daughter Kathy, looking at one taken last month remembered it as "Lulu Belle," not Standard Oil No.1!