Frisco Railroad Whistle Signal Personal List Of pollard Matlock Tulsa? For Sale

The product appears to be a personal list of whistle signals used by employees of the Frisco Railroad, likely kept for reference or training purposes. It could contain specific instructions or codes for various whistle signals, possibly including for signaling and responding. This item would be of interest to collectors of railroadiana and transportation memorabilia, providing a unique insight into the communication and operation of a specific railroad company. looks like his pocket reference list of signals. Pollard matlock