SEYCHELLES 1901 SG40 Mint 6c on 8c brown-purple and ultramarine interpane block of 60 digital-edition 1910) promoting the benefits of

1910) promoting the benefits of the "Printex" process for the rapid production of plates for surface-printing via photo-etched dies (without the need for hand-engraving)

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- P212011033

RK and RL showing basal shifts and long tailed "R" varieties

[Union Handbook O155] - P212009905

SEYCHELLES 1901 SG40 Mint 6c on 8c brown-purple and ultramarine interpane block of 60 digital-edition 1910) promoting the benefits of1901 6c on 8c brown purple and ultramarine, type 5a surcharge, interpane block of 60 (12x5) from plate '2' being the lower five rows of a sheet with full margins, showing two impressions of the surcharge setting of 30 (6x5), o. g. (stamps unmounted). Slight toning, and small fault at upper right, but very interesting and scarce in this format. (cat 570+) P212014567