American Flyer Whistle 568
The 568 whistle was produced in 1956 and had a green plastic base. The whistle was different from earlier years as Gilbert continued to move towards plastic materials. The picture on the sign was of a northern railroad. The whistle came with an operating button and was hooked up to a transformer for the model railroader.
Gilbert produced approximately 11 different type of whistles and/or billboards. They included:
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The primary whistle differences were a whistle vs. a horn and the billboard imagery. Often times the billboard pictures featured other Gilbert products such as erector sets or chemistry sets. The American Flyer Whistle 568 was a fairly normal version of the American Flyer Whistles.