The Pennsylvania Railroad

Supplemental Instructions

To Operating, Signal and

Interlocking Rules

September 25, 1949

Measures Approximately:

4-1/4"  x  9-1/4" closed

Saddle Stitched
63 Pages + Covers

Writing on top of front cover.
There were revisions to this booklet on page 1 plus other pages within the book, the revisions and updates were pasted over the original type.

Please refer to pictures as they are an important part of the description

-Thank You-