" Does anyone else have input regarding 'Model NO'? "

As far as I know, parallel to the 1952 / GK model that was intended for export, a NO model was produced until 1964 for the European market, but with a straight bolt grip and for european standard calibers. However, there were always deviations according to the models , for example regarding the safety device , on the side or on the back of the pistol grip of the stock.

You can imagine what for hybrids were made until to the Model 1972 , including a few rifles caliber 9,3x64.