O-N, sounds a nice find, so many Japanese binocs sold in the US in the 60s/70s are not often seen in the UK, or maybe they just gave them different brand names here. I have never come across a Manon yet, but quite a few come up on the US auction site. Is it the fully coated one?
It's fully coated, with MgF on the outside surfaces and Amber/Luminous
multicoatings on the inside surfaces. I like that combination a lot...a little
haze suppression but very true color, not yellowy. This is an early Manon.
I would get 'plain vanilla' Manons again. The exotic-looking ones, not so sure.
I got very super build Manons with irising that made them dim...they went too far
looking for contrast on that model.
They have a Zen shrine for a logo. They used the name "Shrine Manon"
sometimes in their photo equipment. I remember. Their amber is similar to
that on the SMC (Super Multi Coated) lenses made famous by Asahi Pentax.
I had a camera with an SMC-Takumar lens, the SP-1000.
The Bushnell Customs I got a while back have the same scheme:
violet coatings outside and amber/luminious multicoatings inside.