The dial on your dad’s wristwatch was the type of dial that was used on RR grade pocket watches for the Canadian railroads.
Longines produced a 17j RR grade wristwatch, possibly in the 1940s, that was approved by the Canadian Pacific RR. It was known as the model RR280. The the jewel count, model and serial number should be stamped on the movement.
Pocket watches stayed popular with the RRs into the 1960s because they easier to work on and the big black numbers on a white dial and black hands were easier to read at night. Being carried in a pocket on a chain offered more protection against accidental damage. They were in use for nearly 90 years before the first wristwatches were approved for RR service.
I always check to see what something sells for on eBay to determine its value.
Longines produced a 17j RR grade wristwatch, possibly in the 1940s, that was approved by the Canadian Pacific RR. It was known as the model RR280. The the jewel count, model and serial number should be stamped on the movement.
Pocket watches stayed popular with the RRs into the 1960s because they easier to work on and the big black numbers on a white dial and black hands were easier to read at night. Being carried in a pocket on a chain offered more protection against accidental damage. They were in use for nearly 90 years before the first wristwatches were approved for RR service.
I always check to see what something sells for on eBay to determine its value.

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