Up for sale is an authentic, original 1928 operating broadsheet notice from The New York, New Haven and Hartford Railroad Company, dated December 1, 1928 (Form G.M. 258).

This official document was issued by General Manager J.A. Droege to alter Rule 14 of the Government of the Operating Department. It contains a highly detailed chart mapping out standard steam locomotive whistle code signals utilizing long dashes and short dots. It features codes for public grade crossings, station approaches, brake failures, and livestock/person track alarms. 

The reverse side includes period pencil notes tracking rule book insertions dated December 1928.

Condition: In good vintage condition with crisp printing and completely legible text fields. Features standard distribution folds and minor edge toning as shown, but remains sturdy and intact. An exceptional piece of New Haven line railroadiana history. Please see all photos to evaluate exact condition details.