exploration outer space for peaceful purposes youth stamp exhibition children drawings serie circa 1974 |
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| navigate by keyword : 1974 antique art bulgaria children circa correspondence design drawings envelope exhibition exploration heritage historic hobby image issue letter mail national old outer peaceful philatelic philately post postage postal postmark purposes space stamp vintage youth |
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| MOSCOW, RUSSIA - SEPTEMBER 15, 2018: A stamp printed in Bulgaria shows Exploration of outer space for peaceful purposes, Youth Stamp Exhibition '74: Children's Drawings serie, circa 1974 |
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