This is an 8½" x 11" reprint of two pages (April 20, 1939) from Lionel's Chief Engineer, Joseph Bonnano's personal diary. These pages describe the "requirements for couplers RF control system." This was well ahead of the 4109WS Electronic Control Set issued in 1946.
An exciting piece of history.
This document was shown on page 18 of the Authoritative Guide to Lionel's Postwar Operating Cars.
Note: The actual document will not have the Project Roar watermark shown on the picture at left. A Project Roar authentic hologram is provided to ensure authenticity.
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