ZAAP

The Tommy Armour ZAAP is known, according to best-putter.com, only by the four letters ZAAP on the putter head. That's the whole identifying mark the publication points to, no fuller name or model description attached to it.

best-putter.com also reports that the ZAAP line covered many head designs, from blades to mallets, with the ZAAP name apparently applied across the shapes rather than tied to one profile. The same source lists the toe hang as face-balanced, though whether that held true across every head design in the line isn't something the record clarifies.

On usage, best-putter.com states the ZAAP was used by tour players all around the world, with some carrying it into the 2010s. That's the extent of what's on record for this release: a name, a spread of head shapes, a balance point, and a claim about who played it and for how long, all from that one publication and none of it independently verified.