Question on Stamp

[hcmheart]

Hello, 

Does anyone know why these stamps have the stamp NYT.   It is a postmark?  Thanks Bob

[daintydorothydoll]

They are called "perfins."

This will explain all.

www.nytimes.com/1984/11/04/arts/stamps-what-the-holes-mean.html

[hcmheart]

Thanks for taking the time to reply

[daintydorothydoll]

You are most welcome. 🙂