1877 - 20c blue Bigola and 10c blue 'inverted colo
1877
1877 - 20c blue Bigola and 10c blue 'inverted colors' franking with 'twin values' from 'BERGAMO BASSA 28 AGO 77' to Riva (Austria). Extremely rare combination, possible only for one month. Splendid. Cert. E.Diena (Sassone T26+27 - Zanaria-Serra Lire 18,000,000)
FIRST SESSION: 16/05/2026 Hours 11:00 am - Lots 0001-0734
SECOND TORNATA: 16/05/2026 Hours 02:30 pm - Lots 0801-4045
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