“FOR LIGHTING & SIGNAL SYSTEMS WHISTLE MAKER:ZÖLLNER GMBH TYPE:ZET-HORN 131 AC SN NO. BSH/4615/60128 BUILDING YEAR 2009” “SIGNAL SAMPLING PCB 10061012 / BZ5-HOH-64ZK / 2K1001 ” Z?LLNER GMBH .ZET-HORN131AC .JH7. 623. 414