Whitman Expo
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Obverse Description
Front (vertical): Portuguese text; chemist Roberto Duarte Silva; chemical symbols; serpent wrapped around a chalice; mortar and pestle registration device; coat of arms on Oberthur Iriseal OVI patch
Reverse Description
Back (vertical): Portuguese text; Trapiches - Ilha de Santo Antão (sugar cane press island of Santo Antão); mortar and pestle
Catalog Information
GSID:
91404
Variety:
25 de Fevereiro de 2007 Sig 8: Frederico/de Burgo Prefix GA - GQ
BNB #:
B213a
Pick #:
P69
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To: editor@greysheet.com
Subject: I would like to contribute catalog info to CDN for 25 de Fevereiro de 2007 Sig 8: Frederico/de Burgo Prefix GA - GQ
Body: Referring page: https://www2.greysheet.com/prices/item/25-de-fevereiro-de-2007-sig-8-frederico-de-burgo-prefix-ga-gq/gsid/91404 GSID: 91404 Title: 25 de Fevereiro de 2007 Sig 8: Frederico/de Burgo Prefix GA - GQ
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Request Pricing 20 de Janeiro de 1977 Sig 1: da Luz/Santos Prefix A/1, B/2, C/3, D/4, E/5, F/6, G/7, H/8, J/9
No ovpt; no perf; no sig ; no s/n
Diagonal black ESPÉCIME ovpt front/back; horizontal black SPECIMEN No # ovpt lower left front; all-zero s/n
Diagonal red SPECIMEN ovpt front/back; horizontal red SPECIMEN OF NO VALUE ovpt upper front/back; horizontal black # ovpt upper left back; all-zero s/n
No ovpt; no perf; no s/n
20 de Janeiro de 1977 Sig 1: da Luz/Santos Prefix A/1, B/2, C/3, D/4
Separate uniface front/back proofs on large paper
Diagonal red ESPÉCIME ovpt front/back; horizontal red SPECIMEN No # ovpt lower left front; all-zero s/n
Diagonal red SPECIMEN ovpt front/back; horizontal red SPECIMEN OF NO VALUE ovpt upper front/back; horizontal black # ovpt upper left back; all-zero s/n
No ovpt; no perf; no s/n
20 de Janeiro de 1977 Sig 1: da Luz/Santos Prefix A/1, B/2, C/3, D/4
Diagonal red ESPÉCIME ovpt front/back; horizontal red SPECIMEN No # ovpt lower left front; all-zero s/n
Diagonal red SPECIMEN ovpt front/back; horizontal red SPECIMEN OF NO VALUE ovpt upper front/back; horizontal black # ovpt upper left back; all-zero s/n
Diagonal red SPECIMEN ovpt front; horizontal red SPECIMEN ovpt back; horizontal red SPECIMEN OF NO VALUE ovpt upper left; red # ovpt upper right back; all-zero s/n
No ovpt; no perf; no s/n
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Wednesday, June 3, 2026