Germany, Imperial. A Navy (Kaiserliche Marine) Oberleutnant Zur See Shoulder Board Pair certificate_of_authenticity where it was noted in

where it was noted in his final medical examination that he had a wound scar on his left hip and a scar on his left hand

four small rivets on the reverse

He was transferred from the Royal Canadian Artillery

Footnote: The Luftwaffe-Flak Abzeichen was a German military decoration of the Second War

Germany, Imperial. A Navy (Kaiserliche Marine) Oberleutnant Zur See Shoulder Board Pair certificate_of_authenticity where it was noted inFour rows of fine silvered bullion wire, interlaced with red and black threading and wound around a white cord, wrapped in a u shape, in a chevron formation, button hole for uniform attachment and housing a brass button bearing an anchor surmounted by the Imperial crown, severed at the shoulder end, underside in black wool, 28 mm x 118 mm each, band of discolourization appearing on the bullion near the shoulder end, better than very fine. (C: 102)