Switzerland postage stamps year 1900 -1935 used collection

That period (1900-1935) was a dynamic time for Swiss philately, marked by the transition from earlier definitive series to new, iconic designs, and the introduction of regular commemorative/semi-postal stamps.

Here are some of the key series and notable issues from Swiss postage stamps between 1900 and 1935:

🌟 Key Definitive and Semi-Postal Series

1900 Universal Postal Union (UPU) 25th Anniversary:
- This was a commemorative issue showing the allegorical figure of Helvetia receiving a message. It is a key stamp to mark the turn of the century in Swiss philately.
Definitive Stamps (Cross and Numerals, Helvetia, William Tell):
- Cross and Numerals (continued): Some lower values from the late 19th-century series (Cross and Numerals) continued in use into the early 1900s.
- “Helvetia with Sword” / Helvetia Bust Definitives (1907-1932): This series featured a bust portrait of Helvetia and was issued over a long period with various printings, papers, and perforations.
- William Tell / Tell’s Son Definitives (starting 1907/1914): A major definitive series featuring a bust of William Tell or his son, Walter Tell (especially on lower values), and the high-value stamps (3-10 Francs) often depicted mountain landscapes or Helvetia. These were in use for many years and have many varieties.
Pro Juventute Stamps (Starting 1912):
- The Pro Juventute stamps, first issued in 1912, became a regular annual feature. They are semi-postal stamps, meaning they were sold at a premium above their postal value, with the surtax (the extra charge) going to a youth charity (the Pro Juventute foundation). These stamps are very popular with collectors and usually feature patriotic, cultural, or natural themes.
Pro Patria Stamps (Starting 1923):
- Similar to Pro Juventute, these semi-postal stamps were issued to raise funds for patriotic or cultural purposes (initially for flood relief, then for cultural preservation). The first stamp was issued in 1923.

🏛️ Notable Commemorative Issues

1919 Peace Commemorative Stamps: Issued after the end of World War I, these stamps celebrated peace.
1924 UPU 50th Anniversary: Marking the Universal Postal Union’s half-century anniversary.
1932 Disarmament Conference in Geneva: A set of commemorative stamps related to the international conference held in Geneva.
1932 Gotthard Railway 50th Anniversary: A set commemorating the major Swiss railway tunnel.
1934 Landscape Definitives (NABA Sheet): A new definitive series depicting Swiss landscapes (like the Via Mala gorge, Chillon Castle, St. Gotthard Railroad), which also had a famous, rare Souvenir Sheet issued for the NABA 1934 National Stamp Exhibition in Zürich.