San Francisco Municipal Railway 41 Union St Louis Car Coach 501 1941 Photo 4 x 6

This June 1941 photograph documents San Francisco Municipal Railway coach 501, built by St. Louis Car Company, at the bridge end of the 41 Union line during a recorded test run in primer paint.

San Francisco’s Municipal Railway, widely known as Muni, operated an extensive network of streetcars and trolley coaches that connected waterfront districts, residential neighborhoods, and downtown corridors. The 41 Union line was part of that interconnected system, serving the northern sections of the city near the bay and linking surface transit to key commercial arteries. Equipment supplied by St. Louis Car Company represented a significant phase in modernization, reflecting evolving body design, electrical systems, and passenger capacity standards on the eve of America’s entry into World War II.

The image shows coach 501 halted beneath an elevated structure at the bridge approach, with overhead trolley wires visible above and passengers gathered near the front entrance. The vehicle appears in primer, consistent with the typed notation on the reverse identifying the scene as a test run. The back is clearly marked “June, 1941 – San Francisco Muni – St. Louis Car Co. coach #501 at the Bridge end of the #41 Union line on a test run. In primer paint,” along with a Railway Negative Exchange stamp, providing strong archival context. The photograph measures approximately 8 x 10 inches and presents sharp mechanical and infrastructural detail characteristic of transportation documentation photography.

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