Cover from North Hollywood, California, USA

Cover from Amman, Jordan

This registered letter from Amman, Jordan without stamps and post mark.
Just post office label on envelope.

Cover from Milano, Italy

Cover from Crete, Greece

Cover from Ma On Shan Post Office, Hong Kong

Cover from Altrincham, Cheshire, UK

The stamps on the envelopes without the post office postmark..

Cover from Hong Kong Post

Cover from Siauliai, Lithuania

                             

Cover from Mumbai, India

Cover from Swansea, United Kingdom