Viking window latch

From your photos, it looks like you can use the 90-278 window lock. If you want to be sure, you can compare measurements between our part and yours.

If you can remove your lock so we can see the locking tongue, we'll have a better idea if it will work for you. Thanks!

It's tough to confirm what your hole spacing is based on just a tape measurer. Such photos are good to get a general idea of size, but when it comes to precise measurements they can be difficult to gauge since the tape measurer is usually a little skewed or otherwise just a bit off. 

In my experience, Many customers with Viking windows have used our 90-278 lock. This has a screw hole distance of 2-1/16". I've known some customers to have a hole spacing of 2-1/4", too, but I don't think that's what you have. It's definitely closer to 2" . The problem is, we don't have a lock in this style with a hole spacing of less than 2". If that's what yours is, I'm afraid we will not be able to replace it. 

If I had to guess for the keeper, then yours was inside the top sash interlock, which itself has been discontinued. Our 90-282 may be a good replacement but I want to stress this is an educated guess. You'd have to look at the old one to confirm.