Asahi Pentax Marine Binoculars
I've recently had some questions regarding Asahi Pentax BIF Marine Binoculars. As a partial answer I'm posting the attached advertising sheet that accompanied the NOS pair I bought last year.
As I understand it the BIF models are descended from Asahi's Japanese military models. Mechanically they appear to be built like the proverbial tank. Optically they are as good as or better than Swaroviski or Nikon glasses I own.
Trust this information will be of interest to at least some on the forum.