Stop in for a cup of coffee

WV64Signet said
I was looking at the lack of zip code implementation.. so between 43 and 63

Love this thread stretching my understanding

5 digit Zip Codes - Mr Zip! are 1963.
I've seen on line that City codes began in WW2 but with under 100 people, Thompson Falls Montana couldn't have had six postal delivery zones .
https://en.wikipedia.org/wiki/Thompson_Falls,_Montana
So I don't know what the Zone 6 is??
In Philadelphia my understanding is the zip codes incorporate the city code at the end. So Philadelphia 1, became 19101.

Then there's US Postal History page that doesn't show any year in the 20th century with 1 cent 1st class postage. ????
So another mystery.

zkx14 said
On second/closer look… by the size of print, it was printed by a flat plate. The perf looks like 10 all around. That makes it a Scott#462. First issued 1916.

Thank you!

At least we know it was mailed 1916 or later.

Would a small envelope have been considered post card rate?