Please Help Identify the Model of This NIPPON Water Ski Pachinko from 1975...

[Magnaflux747]

Here is a much better photo of the Nippon Pachinko machine I have. All I know is that it is a 1975 from the 239-4 code on the sticker inside and nothing else. The back kind of resembles some of the Sankyo models as its green plastic like those... I will get a few nice pics of the back and insides and maybe that can assist in some way. Many thanks to those who look...
Magnaflux

[Moparformances]

these early machines did not have names.. or Models..

they may have had some identification when produced but any of that information seems to have been lost with time.. we Identify them by year. maker, and style.

Model A style of machines "recyclers"

and Model B style. machines.. balls pass threw the machine and then go to the parlor for cleaning and sorting..

these designations are for Nishijin brand machines but yours is a nishijin "B: style of machine.. from the later 70's (would need to see the tax stamp to date ir exactly)

hope that helps..

it was not until a year or two later that machines started getting themes, names or models