These Sferoflex glasses were a find at a fair, some fifteen years ago. The frame marks the final days of the glorious era of the huge glasses. The marble structure is typical for the early and mid 1990's when frame size had been reduced dramatically. So let's keep it at late 1980's or early 1990's.
In this and the preceding portrait, my tripod was just a split second behind Bonnie's moves in her library chair. Dynamics of youth versus diminishing reaction speed of the senior photographer :).