Anonymous board ID

I was looking for something in various junkboxes and found this board:

From the bad old days when I liberated chips from sockets and didn't write down the date or name the boards.  It appears to use a 14 pin quad op amp due to the power supply connections.  There are three sets of wires, power/gnd, input and output ?  There is an LED, also a Radio Shack 1n34 diode.

I *think* it might be a tone detector for Morse code ?  Since it was never boxed I assume it didn't work that well so I'll probably put it back in the junkbox.  The moral of the story:  don't rely on your memory, write it down !

Best Regards,
Chuck, WB9KZY
http://wb9kzy.com/ham.htm