£1 black, S.G. NCom9,

used on an envelope from Galashiels to Bridge of Earn 17 August 1929, machine cancellation, the envelope folded vertically away from the adhesive, the adhesive has slightly stained perforations which appears to have been caused by additional gum to secure the stamp; fine. VERY SCARCE USED ON COVER. (S.G. as a basic used stamp £550)