31.62 mm x 4.15 mm (height) round plastic crystal , gold colour ring with calendar loupe, genuine 063PX5106L Omega® crystal, fits Omega® case REF 1660022, 1660028, 1660060, 1660086, 1660163, 1660221, 1660222, 1660228, 1667270, 1680022, 166028, 166060, 166

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