1977. USSR. 24th International Navigation Congress.

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2d 17h 20m

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BULGARIA 1971 - SPRING 1971

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4d 18h 3m

hrilis (160)

Bulgaria Square 80 Buzludzha Congress 1971

~2⁰⁵ €

2d 16h 17m

trini (99)

1971. Monaco. Congress of the Blood Donor Federation.

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1d 19h 45m

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1971. Monaco. Congress of the Blood Donor Federation.

~0³⁶ €

1d 19h 45m

despot55 (387)

1977. USSR. 24th International Navigation Congress.

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5d 9h 30m

despot55 (387)

1971. USSR. 23rd International Beekeeping Congress.

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3d 19h 40m

despot55 (387)

Postmark 12th Congress of the Bulgarian Communist Party

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1d 2h 40m

Ivodimitrov (1188)

Bulgaria 80 Buzludzha Congress 1971

~1²⁸ €

2d 16h 17m

trini (99)

1971. Czechoslovakia. 50 years of the Czech Communist Party

~1¹⁸ €

3h 17m 35s

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Postage stamps NRB Kiril Tsonev 1896 - 1971 1971

~1¹⁰ €

6d 17h 50m

Ivodimitrov (1188)

1971. USSR. International Congress in Moscow.

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4d 4h 40m

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1971. Romania. 50 years of the Romanian Communist Party.

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2d 17h 15m

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USSR 1971 - WORLD CONGRESS ON THE HISTORY OF SCIENCE

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9d 18h 0m

hrilis (160)

1971. USSR. 24th Congress of the Communist Party of Ukraine.

~0³¹ €

3d 18h 20m

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1971. USSR. Resolutions of the 24th Party Congress.

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3d 6h 55m

despot55 (387)

Postmark NRB XI Congress of the SBF Sofia 1971

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6d 17h 50m

Ivodimitrov (1188)

Postage stamps NRB 20 years FIR 1951 - 1971 1971

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3d 17h 15m

Ivodimitrov (1188)