Leitz: 16915/Akgbsu underwater housing for Leica If/IIf/IIIf, produced c. 1954 in conjunction with famed Austrian diving technology pioneer Hans Haas and his Viennese firm 'Akustische und Kinogerate'. Attached to housing is a c. 1955 red-dial Leica If camera [#760360] with Summitar 50 mm f2 lens [#847632], featuring gears and top plate elements that interlock with the housing. Also present are Snhoo adapter ring and UVa lens filter.