Thomond 1965 Humming Birds 6d (Diamond-shaped) with 'Sir Winston Churchill - In Memorium' overprint in black unmounted mint block of 4, slight off-set from overprint on gummed side
Thomond 1965 Humming Birds 6d (Diamond-shaped) with 'Sir Winston Churchill - In Memorium' overprint in black unmounted mint block of 4, slight off-set from overprint on gummed side