Who Can Figure Out This 4¢ Postage Due Postcard (C. 1910)

Here's an interesting card from the bargain box, that raises a lot of questions. The card originated in Germany. No date, but the typical international card rate was 5¢ around 1910, I believe. So why 4¢ and how would the funds have been returned to Germany where they should have been paid? Can anyone parse out what postal markings are under the stamps? And lastly, the stamps are cancelled but are not tied to the card, so they must have been cancelled before being affixed -- was this common practice?

The UPU rate at that time (1911) was 2 cents for International cards.
Shows a "T" stamp at point of origin (plus other text under the due stamps). The 11/20 may indicate centimes due. Looks like no stamps, so double postage due of 4 cents.

No return address, so recipient gets the bill.
I've seen other cancelled postage due that looks like they were done previous to affixing. don't know how common.

Thats my guess,
pat

The blue crayon marking is:


Precanceling postage due stamps with any provisional device is very common, in this case at Pittsburg, PA (no H, long tangent for another thread) in Allegheny county, PA. There is also an Allegheny in Allegheny county, but the post office clerks obviously knew to direct the H.J. Heinz mail properly.

Accounting: I don't recall the exact date, but at some point the UPU countries just kept their own postage due receipts as the exchange of money transferred was almost equal and took a lot of accounting expense to track it, etc. No doubt someone here can provide more precise particulars on the date.

John - Thanks for fixing the T20.

Here is a pretty good post on calculating the postage due.
Pat

4x(5/1)=T20
https://postalhistorycorner.blogspo...al-mail.html

Pat, that postal history page is very helpful and educational. I'm fairly certain I've seen these "T" markings on other international cards and covers. Now I know what I'm looking at!

Thanks, everyone, for your assistance!