It might simply be a book-to-medium weight of Helvetica with a rounded stroke added. The /fo/ ligature is almost certainly custom (and poorly done)…

It might simply be a book-to-medium weight of Helvetica with a rounded stroke added.

Thus, similar:
http://www.dafont.com/alte-haas-grotesk.font?text=Wolford

The rounding could be caused by bad reproduction…