Germany, Luftwaffe. A Flak Badge, By Gustav Brehmer Auction London Gazette 22 February 1918:

London Gazette 22 February 1918: For services in action with enemy submarines

the underside of the neck-guard is painted black

ribbons slightly discoloured

with a gilt surmounted Imperial crown and a beneath clasp on the 12 o'clock arm

Germany, Luftwaffe. A Flak Badge, By Gustav Brehmer Auction London Gazette 22 February 1918:(Flak Kampfabzeichen der Luftwaffe). Constructed of silvered feinzink, the obverse consisting of an oval oak leaf wreath, topped by a Luftwaffe eagle clutching a mobile swastika, with a central Flak 88 with its barrel raised and extending beyond the wreath, the reverse with a barrel hinge and vertical pinback meeting a flat wire catch, maker marked with the logo of Gustav Brehmer, Markneukirchen, measuring 44. 93 mm (w) x 64. 07 mm (h), weighing 29. 1