As p.w. Gruen collector I know very little about the w.w. I like this 10&1/2 ligne 15j adj.
Marked Gruen case, dial, and movement, and Watch Specialties. Old Gruen mark is DG&s.
Did W. Spec. division start with w.w. and when? Is this one about 1910? Shown with 16s glass back case Columbus.