Pívot on lower two corners

Hello!

We'd be happy to help but we'll just need a few more details to help narrow down some options. Can you write out the distance between the two installation holes measured from center to center? We'd also like you to write out the backset which is measured from the center of the installation hole to the edge of the lock. For example, the 7/16" measurement for the lock below is the backset. 

Detail of 90-161

Oh, my apologies! In that case, we'll need to see the pivot shoe removed from the window to compare to our inventory. I'm afraid it's too obscured by the window track in your photos for us to make out.