Need help trying to determine which Window Lock I need

I've attached some pictures of the window lock piece that I need to replace for my kitchen window. The window opens out and the locking mechanism has broken apart; therefore I cannot close ( seal ) the window and lock it. I was not able to see the part that I need after a long search on your website.

I've enclosed a few pictures, hopefully they will be of assistance to you. Thank you in advance for your help with this matter.