This 1K has been assigned to the former F seats on IAD-FRA and FRA-IAD.
While I don't remember what seat I chose for the outbound, I know for certain on the return I picked 6G. I now find myself in 1H.
We'll see what bird I end up with.
I will be sure to post if this lowly 1K is bestowed the honor of flying in the old F seats.