|"American Bridge Co., U. S. Steel Co."|
The person from whom I got the card described the deck as "Souvenir Playing Cards," manufactured circa 1905 for the May Drug Co., which was a well-known Pittsburgh pharmacy chain. If that date is right, the card shows how large the plant already was by the time Ambridge was incorporated in 1905.
The footbridge in the foreground allowed steelworkers to cross the train tracks and passengers to access the train platforms.
Here's the back of the card:
|Playing card back|
A picture of the "Fort Duquesne" Block House--the still-standing Fort Pitt Block House--is centered on the back. The City of Pittsburgh seal is on both sides of the Block House.
The tartan pennant at the top is that of the Carnegie Technical Schools, the predecessor to Carnegie Institute of Technology, currently Carnegie Mellon University.
A University of Pittsburgh pennant is at the bottom.
The two other pennants have City of Pittsburgh seals.