I.D. Help needed.

I recently purchased a Pratt & Whitney R-2800 inlet valve, or so I thought.
This was from the USA.

I have just been on a site and have seen the wreckage of an R-2800, in which there is a photo of an inlet valve.
Has anyone a photo of an inlet valve for the R-2800 ?.or describe one to me please?.
I have a funny gut feeling I may have been screwed.
Thanks all.
Jim.

Lincoln .7