1901년 미국 발행 팬아메리칸 엑스포 기념 1센트 증기선 역쇄 에러우표
1901 1c green & black, center inverted, slightly dried original gum, well centered and fresh, nearly v.f., with 1984 PFC and 1990 PSE certificates (both stating "previously hinged") and 2017 PFC (stating "slightly disturbed original gum"). A most attractive Pan-American Invert, Cat. Val. $12,500 Estimate: $5000