GB *MERCURY* AIR MAIL ESSAYS Corner Margin Blocks of 5 {2} IMPERF PROOF & PERFORATED Issue 1923 1288

SUPERB MATCHED PAIR OF DE LA RUE IMPRINT STRIPS. Both items UNMOUNTED MINT on two impressions - hinge remains on three. Very Fine for an item of this type and period. Please look at all the scans to help form your own opinion.