Is this Cornwell Watrous maker mark? If not, whose?

[Daboodeb]

It’s a W with either a half circle or half moon wrapping the left side of the W. Underneath it has NH1.

Thank you in advance.

[JeffTucker]

Very consistent with other examples of the Watrous mark, so I’d say there’s virtually no doubt.

[Bartholomew]

Cornwell Watrous