I would have thought at this point in time that most antique dealers would knew what graflex flashes were all about... Then I went into a shop where they do a lot of restoration of antiques - to ask about some graflex cleaning tips. The two older guys (late 50's?/early 60's) looked it over, gave some tips... then asked what it was. Surprised, I told them it was a flash from a press camera... used for Lukes saber - and instantly watched them turn into kids.
They were taking turns waving it around... said they had never seen one in their 30 plus years of cleaning antiques. It was weird.
Funny thing was, I was actually going to clean it and sell it (wasn't happy with the shape it was in), but there was something so cool about that moment, I've kept that battered up graflex to make into an ESB.