Need Help With Scott's Number And Cancel Info On 1950 Cover

I found this among my dad's old papers. I'm not a collector of US so I hope someone will take a second to give me a Scott's number for the stamp. Some info on the cancel would also be appreciated since I'm just used to the standard CDS and don't even know how to describe the other portion. I've just included one end of the cover. Thanks.

Stamps are Scott 807, issued in 1938.

The cancel is a "duplex killer." Both the CDS element and the obliterator to the right were part of the same hammer and struck at the same time.

John, I presume addressed to a relative of yours who was living in a displaced persons camp? There is much info online about this sad period in history.

Jenny, I think John's dad was in Germany as part of the occupation troops. Same thing I was doing some ten years later.

Peter

Actually guys both sides of the family were refugees after WW2. My parents were married in Germany in 1948 while living in the camps. Here's the letter that was inside. Everyone was working on sponsorships to come to the US.

In the center of the obliterator part of the cancel is the a number 1. Is there any particular significance to that? Or is that because Fort Atkinson only had one post office and there wasn't a need for other numbers for branches?

Yes, often called a coded obliterator it has the post office number.

Stallzer thank you for the information and especially the picture. I just learned a bunch here.

It is great to have things passed down to you from your family. They are things to be kept and treasured for what they mean to you in terms of knowing where you came from and what your parents or grandparents or great grandparents and so on went through to make your life today possible.

If you are wondering about values, these stamps do not really have any. For example, I just did a quick check on ebay and found an auction with no bids on it offering 100 of this particular postage stamp for $2.99. But as I said, the value is in the family history of this letter to you and your descendents and in those terms it is priceless.