This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
PolteWerke Prfund Messanlage . PolteWerke Prfund Messanlage Scanned from Polte Armaturen und Maschinenfabrik Jahre Armaturen GesamtAusgabe Magdeburg Deutschland publishing date of the catalogue unbekannt not credited PDold PolteWerke Files by Wistula Valves
Page 2023 Free-images.com. All images are Public Domain