GB QV 1880 SG121 e Brown PD Plate 1 Fine Used No watermark Extremely Rare

An extremely rare surface printed SG121 variety (e), no watermark, listed as existing, but no current catalogue value given in Stanley Gibbons specialised. A recent find.  Fine used example with fine London 6 cancel. No faults.  First one we have come across in 30 years. An exhibition piece for the GB specialist 2s Specialist collector.