The history of PZO (Polish Optical Industries) is quite interesting and dates back to the late 19th century. Their roots and knowledge comes from the famous French Krauss and German Zeiss.This binocular's optics, unfortunately, does not reflect this pedigree. The view is like you're watching an old sepia photographs and not particularly bright nor wide. Reverse view does not show traces of balsamin (their glue-karbidol for joining optical elements) and the optics are clean without any mist. I suppose it was made before 1960 (around 1957) so it is without any anti-reflection coatings. Minimum focus distance is only about 9 m. But the image is quite sharp and its mechanics is excellent.