The first 24mm lens designed specifically with a reflex F-mount was introduced in June, 1967. The Nikkor-N 24mm f/2.8 Auto lens has a retrofocus design, it was based on a creative design concept by Nikon optical engineers, combines a super picture angle of 84° and coupled with a fairly fast speed at f/2.8 (fastest lens among the same focal length lenses available during that period) [source: leofoo].
This first version has the “Nippon Kogaku Japan” label but mine was simplified to just “Nikon” — but it is still probably among the older 24mm Nikkor lenses because it has a minimal aperture scale of up to f/16 only (f/22 was later added in 1975). Anyway, I love the design — especially the deep ribbed “scallop” grip for the focusing ring.
Some sample photos: