This is the 'small version' of public mailboxes and, to tell you the truth, I had to make a good search before I found any mailbox at all! But here you are: if you would ever come to Moscow, you may be so lucky as to observe such blue metal boxes here and there. I wonder, thought, why is it so hard to find one of them nowadays? May be they are not as popular now as they used to be? Frankly saying, I just realised that the last paper letter I wrote was sent several years ago!