[Single, 'stamp' gummed sticker celebrating the stamp centenary exhibition and "sold in aid of the Lord Mayor's Red Cross and St. John Fund." Printed in magenta].

Licence: In copyright

Credit: [Single, 'stamp' gummed sticker celebrating the stamp centenary exhibition and "sold in aid of the Lord Mayor's Red Cross and St. John Fund." Printed in magenta]. Source: Wellcome Collection.