Undersea research in the Black Sea issue of Bulgaria
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Short desc: Undersea research in the Black Sea
Issuer: Bulgaria Date: 1/24/1973 Consists of 8 stamps: (See stamps as list) 1s d=diver perf=12.5 2s d=Underwater House â€Shelf 1†perf=12.5 18s d=Camera Lift NJW 100 perf=12.5 20s d=Divers imperf 20s d=Underwater House â€Shelf 1†imperf 20s d=Camera Lift NJW 100 imperf 20s d=Lifting Balloon imperf 40s d=Lifting Balloon perf=12.5 |
