Weinmann engraved centerpull brakes are illustrated in the 1959-1965 Holdsworth catalogues (don't know about 1966). The 1967 Holdsworth catalogue shows the Weinmann centerpull with the more familar indentation for the brand/model tag.
The 1963 Guarantee Cycle Co. catalog shows the engraved Weinmann centerpull.
Peter ...................................... Peter Brueggeman La Jolla California United States America pbrueggeman(AT)ucsd.edu
From: Harvey Sachs Subject: [CR]JC Higgins v. Ted Williams Sport Racing...
.... the earlier Weinmann brakes with "Vainquer 999" engraved on the outer arms, etc. It is clearly earlier, perhaps late '50s. Anyone have a sense when Weinmann changed the brake design?