James
Like the Postmaster doesn't know where the Museum mail goes.
But they have to play by the rules.
I remember when a picture of Alfred E. Neuman on the envelope would get
it to the offices of MAD Magazine.
Or when a girl at college wrote Grandpa & the ZIP code and it got to him
(Small MN town- she did have her return address tho.)
If you are wondering, I know you are, ZIP came in July/Aug 1963.
Tim: The package is in todays mail.