Originally posted by macTak Falk, here are two photos I found of the K-7 cutaway, and that detail looks the same (still doesn't not mean that the cut out is not a K-5, in fact the optics in the AF system look different to me):
Thanks for the photo.
The detail is different actually. Look at my attachment, left K-5 (from above), right K-7 (from your photo).
The K-7 "AF stray light blade" is a rounded thingy with a gap, the K-5's is straight meeting at a 90° angle.
So, the cut out model is from a K-5 confirmed. Moreover, the lens cut out is normally glued and cannot be removed. So, it cannot be the identical model. Of course, could still be from a K-7 which is why we need to look at that detail.