The history of PZO - or "Polish people have also something to boast of..." part II - Polish Optical Industries (PZO) – the postwar reconstruction and development till 1966 - LensTip.com
Mikroszkóp: PZO Mst-130 4 (kép)
Adapter Foto tubus Phototubus Zeiss SM xx PZO MST 130 131 Stereo mikroskop | eBay