Hi diverdude1,
This was one of three DCF models offered by Nikon in 7x26, 9x30 and 12x36. The first two were introduced in 1976 and the 12x36 followed in 1979. They were offered until the late 1980’s.
They all had the same body, prisms and eyepieces and differed in the objectives, as can be sen in a catalogue image. While they were well built, they suffered from the limitations of the time, especially in relation to their coatings. In particular they lack phase-coating, so the image will not be sharp, especially at 12x.
For some more information see the thread and links at:
Nikon H-line 9x30 DCF Roof Prism Manufacture Date ?
John
p.s. For a current comparison of the performance of the 9x30 to a Nikon 8x30 EII, see post #9 and on at:
Nikons Thirty Somethings (30-35mm) - Binoculars - Cloudy Nights