SO 1920 – Overprints from the Cieszyn Silesia Territory

The SO 1920 series is one of the most historically significant overprint issues of Czechoslovak philately. Issued in 1920 for use in the disputed regions of Cieszyn, Orava, and Spiš, these stamps were valid during a short period of provisional Czechoslovak administration.

Historical Significance

The overprint “SO 1920” stands for "Silesia, Orava." Applied to standard Czechoslovak stamps, their limited issuance and short-term use make them rare and valuable collector’s items.

Types and Collector Value

Collectors can find various overprint styles, errors, inverted overprints, and covers. Some pieces are considered highlights of classic Czechoslovak philately and fetch premium prices at auctions.

Discover SO 1920 stamps – rare historical artifacts from a critical postwar moment.