SG696ag. 1966 (8 August).
4d Birds. Multicoloured. 'Bright blue (from gull (water) and blue tit) Omitted'. Ordinary paper.
Brilliant Post Office fresh Unmounted corner 'traffic lights' sheet marginal mint block of eight (two se-tenant blocks of four), also showing the bright blue omitted from the 'traffic lights'.
Very Rare and Outstanding.