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Stamp picture
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First day of issue: May 22, 1972
Occasion: 1972 Men's World Ice Hockey Championships,1972,Prague,Czechoslovakia
Width: 32 mm
Height: 32 mm
Perforation: Perforated 11.00 x 11.00
Printing method: Engraved
Location: Ice Hockey Volume XLI
Stamp ID = 4605

According to the Pofis stamp catalog (a Czech stamp catalog) there are a number of overprint varieties for this stamp because of plate flaws. This is a "DV35" plate flaw, a flaw in the "Č" in "ČSSR". The caron on the “Č” is slightly sliced.

Close up picture of error

Miller, Rick. "Stamps show where the dead countries are buried." Linn's Stamp News 23 Dec. 2019: 16-17. Print.

Czechoslovakia (1918-93)
Czechoslovakia's first stamps were issued in 1918, and its last regular postage stamp was issued Dec. 18, 1992. In total Czechoslovakia issued almost 2,900 postage stamps, about 170 semipostal stamps, 93 airmal stamps, three special delivery stamps, three personal delivery stamps, more than 100 postage due stamps, 15 Official stamps, two local Official stamps and about 35 newspaper stamps.