Were Pre-war S&W K frame grips made without a diamond center?

[Just_Me2]

I have this right panel grip that does not have a diamond in the center, and I have seen some photos of plain checkered grips, but sometimes its hard to tell if it is legit, or some aftermarket version, or a clone like the Spanish Eibar. Can anyone advise on this ?

Here is an example of mine:

 

[VM]

No, that is not S&W. I would suspect that it Spanish copy or the like