Switzerland - First Day Cover - 500th Anniversary of the Birth... (1993)

€ 0⁷⁰ 
1³⁷ BGN

12h 35m 17s

secko (164)

Bulgaria First Day Cover of No. 2506 from the 1975 catalog

€ 2⁰⁵ 
4⁰¹ BGN

5d 3h 5m

stoian76 (676)

Switzerland - First Day Cover - People at Work (1975)

€ 0⁴⁰ 
0⁷⁸ BGN

10h 45m 17s

secko (164)

Bulgaria first-day airmail envelope No. 2704/06 from 1975

€ 0⁷⁷ 
1⁵¹ BGN

5d 12h 10m

stoian76 (676)

Great Britain - First Day Cover - Nature Through..(1980)

€ 0⁴⁰ 
0⁷⁸ BGN

6d 10h 1m

secko (164)

Liechtenstein - First Day Cover - 30 Years Red Cross (1975)

€ 0³⁰ 
0⁵⁹ BGN

2d 12h 45m

secko (164)

Philippines - First Day Cover - 25th Anniversary International... (1975)

€ 0⁶⁰ 
1¹⁷ BGN

6d 10h 36m

secko (164)

Switzerland - First Day Cover - 100 years of ...(1975)

€ 0⁵⁵ 
1⁰⁸ BGN

10h 50m 17s

secko (164)

First day envelope - "Soyuz-Apollo" July 15, 1975

€ 0⁶⁶ 
1²⁹ BGN

3d 2h 25m

emmy (684)

Switzerland - First Day Cover - Archaeological Finds (1975)

€ 0⁹⁰ 
1⁷⁶ BGN

10h 35m 17s

secko (164)

First Day Cover 2021 - 100th anniversary of the birth of John Glenn

€ 4⁵⁰ 
8⁸⁰ BGN

1d 8h 35m

iv_7 (618)

Bulgaria an ancient envelope of No. 2488/93 from 1975

€ 0⁷⁷ 
1⁵¹ BGN

10h 15m 17s

stoian76 (676)

Bulgaria's first-day envelope at No. 2470/76 since 1975

€ 1⁵³ 
2⁹⁹ BGN

3d 9h 35m

stoian76 (676)

FIRST DAY FLOWERS OF FRUIT TREES 1975

€ 2⁰⁵ 
4⁰¹ BGN

9d 4h 28m

zizisom (814)

FIRST DAY HISTORY OF BULGARIA 1975

€ 2⁰⁵ 
4⁰¹ BGN

9d 4h 28m

zizisom (814)

Bulgaria first day envelope on №2522 from the catalog from 1975.

€ 1⁵³ 
2⁹⁹ BGN

6d 12h 55m

stoian76 (676)

Philippines - First Day Cover - Special Stamp...(1962)

€ 0⁵⁰ 
0⁹⁸ BGN

6d 10h 36m

secko (164)

EUROPE CEPT first day cover Austria 1975

€ 2⁵⁶ 
5⁰¹ BGN

4d 0h 4m

trini (167)