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Auction: 25015 - Stamps and Covers of the World
Lot: 3435

(x) Switzerland
1935-37 Airmail 10c. on 15c. light green and green block of four, variety surcharge inverted, unmounted mint. A wonderful exhibition showpiece of superlative quality, extremely scarce as a multiple from the one sheet of fifty, small expert handstamp on the reverse of each stamp and one with small ink mark. S.G. 359a, £40,000+; Zum. 20. 1A.09, CHF 68,000 +

provenance:
"Doyen", Spink, October 2020

Subject to 5% tax on Hammer Price in addition to 20% VAT on Buyer’s Premium.

Estimate
£6,000 to £8,000