In Japan, compared to elsewhere, double-band projectors for studio-use were mainly imported despite the history shows the abundance of domestic manufacture of 16mm projectors.
However, very few versions of some models with the provision for recording on magnetic film added were available for consumer-use as found in other brands.
R is the version’s key letter (stands for Recording).
3 is the version’s key #.
Please notice the last generation BELL & HOWELL 16mm projectors were rebranded and made by EIKI. They are completely the same equipment except the model numbers.
R and M are the version’s key letters (stand for Recording and Magnetic respectively). * via optional recording adapter
Sincere thanks to my friend Mr. Muddy Orihara for inspiring me to create this post and the model information provided.