Stamps & Covers Public Auction 365

1922 Philately for Children opt 2k-10k, all error opt inverted (reading up), from later printing. VF fresh MNH. SG 274-7(var) mentioned in footnote but unpriced, Mi 186-89K cat €2100 for M, should be at least double, €4200 MNH. Only on sale for 1 day in Moscow at 5 million times FV! 80% of which was a tax for juvenile welfare. Very rare. Exp Dr P Jem, plus 2020 Hovest photo cert. (4) (P)
Estimate A$1000