Hella Police Flasher light lamps blue 71482 CH1 2077

A set of two (2x) blue Hella Police Flasher light lamps in used condition. The lenses are without damages but one lens has two bottom water holes (see photos #2). The rear is without damages but one screw is missing. It is likely that the missing screw is inside because it sounds like that. Both lenses are 100% the same and stamped with "HELLA, MADE IN GERMANY, CH1 2077, A 71482, K45, CE". The case is stamped with "Before opening switch off power unit and wait 1 minute!”. The lens is 9 x 12 cm and the depth 6 cm.