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Is A17 on this envelope the inspector's mark

Posted:
Fri Jul 19, 2024 2:05 am
by XiaoH
This envelope has a handwritten letter and number similar to A17.
What does it mean?
Is this the mark of the inspector in Petrograd?
Looking forward to receiving answers and clarifications from all friends
Re: Is A17 on this envelope the inspector's mark

Posted:
Fri Jul 19, 2024 6:44 am
by XiaoH
In addition, there are three handwritten instructions on the back of this envelope that should have been written by postal staff or inspectors during the transit process. Could you please take a look and tell me what they are and what they mean?
Re: Is A17 on this envelope the inspector's mark

Posted:
Sat Jul 20, 2024 8:14 am
by XiaoH
Looking forward to receiving answers from postal history experts and philatelists. Thank you