1911-12 'Relais & script' h/s Shah 13ch blue & violet horiz pr left stamp h/s INVERTED, resulting in TETE BECHE pr. VF fresh M, small thin. Sc 523/523(var), SG 388a/388a(var) error unlisted cat £200+ as normals & should be x5 or x10 so £1000-£2000 for such error pr. Persiphila 513/513a listed but unpriced. Extremely rare & spectacular. 2020 Sadri photo-cert. (P) (Image1)

Estimate AU$1,000