I am looking at a s/n C260490 992B c.a. 1949 in a s/n K262144, #11 Case with a VERY interesting "numeric" dial. Is this correct?

What you have there is most likely an original combination, fronting a Numerical Dial 151, which was one of Hamilton's first melamine railroad dials. It is correct for your watch, but unfortunately the red 5-minute markers have faded.

Nice Case 11 though. It's the later, non-shouldered version, which is correct for your watch.

I have that same dial on a 950B. Came with the watch with the red 5-minute markers a little faded. Has the baton style hands. Different dial indeed!