Elgin was my father's favorite brand.
I presume the 17 means it has 17 jewels, which makes it a good quality watch. It also has the Durapower mainspring logo, which was one of their trademarked features. If I ever take the back off, I'll offer whatever additional info I can find.
Acquired: 2018
Circa: 1950s
Origin: USA
Type: mechanical
Features: Durapower mainspring
Current condition: runs fine