1953 Elgin Curtis
I think this is the 1953 Elgin Curtis. It features the 673, 17 jewel, 4 adj, manual wind movement. It dates to 1953. The case number is 6526.
The case is 10k gold filled with a stainless steel back.
The obvious feature of the watch is the integrated Hadley band the matches the bezel.
Pretty sharp little guy.