I snapped this a few years ago at the California Museum of Photography. Canon F1 and Arista Premium 400 (re-branded Tri-X) processed in Rodinal. (Apologies if I have posted it before.)
Thank you, Pete. Much appreciated. Yes, they are stereoscopes and the young lady (who happens to be my daughter, Caitlin) is peering at one through a stereoscope.
I didn't see any prohibitions to photography inside the museum and each time I've been there I've snapped happily away. However, I'm sure they'd balk at flash photography.
Thanks Rob. I agree about your "Second View" thread idea.