Original - ‘K.W. Müller - HSM7 - Esslingen a.N.’ SUPERB condition! Air raid protection - anti-aircraft defence - original. Excellent condition, hardly any signs of wear and tear. Unique, intact condition. Explanation: this air raid siren lay for years in a transport box and was as good as never used. The colour, as you can see in the photos, is original. With volume damper. Original air raid siren, now very rare, the condition is unique. ‘K.W.MÜLLER-HSM7-ESSLINGEN a.N. ‘ Height with stand approx. 85 cm - depth approx. 35 cm - complete with tripod. The sound after rotating the crank is deafening. Very loud, although you can adjust the volume on the housing. This device is in full working order and in an excellent condition!!!!!! Collector’s item. Original ‘K.W.MÜLLER-HSM7-ESSLINGEN a.N.’