You can find this display advertised to dealers in the March 1936 Parkergrams. Also, an article about this type of display can be found in the Spring 2007 Pennant. This particular one is well more intact than the one in the Pennant article.
Apparently, the finger is attached to a motor, and moves up and down to simulate the pressing of the filler mechanism. As the finger presses the plunger, lights will light up behind the pen, simulating the pen being filled with Quink.
The auction closed at $177.50 and I am pretty excited for this thing to show up at my doorstep. No matter what the actual value of this piece is, I'm pleased with the price I paid for it. Did I get a bargain, or did I overpay?
Auction Link
Edited by RobertNFrappuls, 11 December 2011 - 06:23 PM.