1. Rarity: The scarcity of a stamp plays a crucial role in determining its value. Stamps with limited print runs or specific errors can be highly valuable. For instance, the "Inverted Jenny" error stamp from the United States, where the biplane was printed upside down, has significant value due to its rarity.
2. Condition: The physical condition of a stamp is essential in determining its worth. Stamps that are well-preserved, with sharp corners, bright colors, and no tears or creases, will generally have higher value than stamps that are damaged or in poor condition.
3. Provenance: The origin and history of a stamp can affect its value. Stamps from prestigious collections or with documented provenance can have increased value due to their association with notable collectors or historical events.
4. Market Demand: The overall demand for a particular stamp among collectors can influence its value. Stamps that are highly sought after and have a strong collector base will typically command higher prices.
5. Cancellation: Cancelled stamps may be less valuable than mint (unused) stamps. However, certain types of cancellations can add value, such as those that indicate specific historical events or locations.
In the case of WW2 German stamps, specific stamps of interest include:
- Germania Issue: Stamps featuring the Germania personification of Germany can be valuable, especially the higher-denomination stamps.
- Eagles (Adlerserie): Stamps depicting various types of eagles were issued during this period and can have varying values.
- War Relief (NSK): Stamps designated for war relief purposes (Nationalsozialistische Kriegswohlfahrt) may hold value.
- Occupation Issues: Stamps issued for territories occupied by Germany, such as the General Government (Generalgouvernement) or Bohemia and Moravia (Böhmen und Mähren), can be of interest to collectors.
- Propaganda Stamps: Stamps with politically themed designs or slogans aimed at promoting the Nazi regime's ideology can command higher prices.
It's worth noting that the stamp market can be subject to fluctuations based on trends, economic conditions, and collector interests. To accurately determine the value of specific WW2 German stamps, it's advisable to consult reputable stamp catalogues, specialized dealers, or professional appraisers who have expertise in this area.