When was Limited Pennyplane (LPP) first introduced?

From: <ykleetx_at_gmail.com>
Date: 02 Jul 2016 13:49:17 -0700

I know that it was the Chicago Aeronauts and Erv Rodemsky. But does anyone know the year?
 

 -Kang
Received on Sat Jul 02 2016 - 13:49:18 CEST

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