Modified frame

Lot number 2692 Quality: *

E - Envelop

N° 67-Cu, "25c blue - Mols Bilingual 1915 issue", in vertical pair, with paper crease "PLI ACCORDÉON", step 1 printing of the frame, step 2 printing of the centre with the paper crease, step 3 gumming, step 4 perforation (distorted), very spectacular curiosity, great rarity, consolidated with hinges, vf