Postmark (Poststempel): 45 Loury, April 24th 1970 /
Semi-Postal stamp of 1970 0.40+0.10 Michel #1706, Yvert #1636
Commemorative stamp of 1970 0.45F Michel #1705, Yvert #1635
Addressee Postmark: Sofia, Bulgaria
Postmark (Poststempel): 45 Loury, April 24th 1970 /
Semi-Postal stamp of 1970 0.40+0.10 Michel #1706, Yvert #1636
Commemorative stamp of 1970 0.45F Michel #1705, Yvert #1635
Addressee Postmark: Sofia, Bulgaria