Joint, twin and siamese issues

The International Philatelic Society of Joint Stamp Issues Collectors has a wonderful website if you are interested in learning more about joint issues, twin issues or even Siamese issues.

Joint issues are stamps released by two or more postal administrations. Most often they mark a common event or anniversary and have either a common design or the same date of issue or both.

Twin issues are joint stamp issues whose design is identical and the release date is the same for all countries involved.

A siamese issue is a type of twin issue in which either the stamps from both countries are physically (se-tenant or within the same miniature sheet) linked together.

A siamese issue can also be one stamp is issued but this stamp bears the name of both countries. According to the The International Philatelic Society of Joint Stamp Issues Collectors there are only two known examples but they don't say what they are.

Anybody know? If you do, e-mail me at donschilling@worldnet.att.net. I'd like to know and I'm sure the rest of us would too.

You can visit the Joint Stamp Issues website by clicking here.