The 'Sykometer' football adapter & pressure gauge by William Sykes Ltd of Horbury, Yorkshire, Club Model, for use with ''Zig-Zag'' and other footballs

The 'Sykometer' football adapter & pressure gauge by William Sykes Ltd of Horbury, Yorkshire, Club Model, for use with ''Zig-Zag'' and other footballs fitted with ''Sykes Triple Seal Valve Bladder'' or ordinary bladders, in original fitted wooden case with printed paper label to lid