The type shown is a Philishave "two-head-egg-type" 7748, in the U.S. sold as the Norelco Electric Shaver 7748, the "Norelco Doubleheader". I suppose in New Zealand they were sold under the name Philips/Norelco.

Up to rib cage, really?

For a nation most Americans would assume to be rather staid and proper, New Zealand seems -- at least as revealed thus far on Shorpy -- to be accustomed to presenting rather more detail as to what lies beneath in its photos for underwear ads. Supposing this photo to be for a catalogue, one wonders if some judicious retouching might be expected en route to the final product.

Wish he was posing holding it somewhere else, say, near his face.