Valves, screwed bonnet type of gun metal with 24°-connection with port end W according to DIN 3861
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 04/01/2002

Screwed bonnet type valves, of gun metal with 24° connection for Type W port according to DIN 3861
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 02/01/2017