How to identify window brand for replacement hardware?

A home owner from MA, USA says:
All of the windows in my kitchen have broken hardware, and as a result, I cannot open any of them. They are all casement windows with crank hardware and plastic latches. In two cases, the crank operators are broken and in one case the locking latch is broken. I have contacted a few handymen to see if they could come fix the hardware but they claim that their hands are tied unless I can tell them what brand of windows I have. I have scrutinized each window and there are no brand markings anywhere. The previous homeowner must have made it a point to remove all stickers and markings, unfortunately. I have also searched many window hardware supplier websites and my results are inconclusive. Some of the latches appear to be 'Silverline', but I can't be totally sure. I am willing to try to replace the hardware myself, but not know the brand and hardware I need to order is really creating a road block for me. I've attached some pictures. Can anyone point me in the right direction?
User submitted photos of a window operator & lock.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
I think we can help replace your hardware, yes. Take a look at the following parts: our 38-090, 33-005, and 70-014. Compare them to what you have to confirm that they match.

For the operators, take a look at our 39-317 and 39-318. Definitely make sure the dimensions (especially arm lengths!) align with yours. The operator handle appears similar to our 39-114L.
A home owner from Waltham, MA USA says:
Hi Dave,

Thanks for the response. I still can't find the brand of the windows themselves, but after a closer look, I found out that the operators and cranks appear to be the Truth Brand. The handles are Truth 45240-5 but I am at a loss for identifying the specific operator. It looks as though my version is a Truth dyad but there is that peculiar brass hardware acting as a second arm underneath it. Is it possible the previous homeowner jury rigger this set up?
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
No, that second arm underneath is the hinge, which isn't connected to the operator at all. I think at this stage you can ignore the brand and stamps, at least for now. They aren't always guaranteed to be 100% right. Just look at the operators I suggested and carefully compare their dimensions to your own measurements. If they differ in any way, let me know how and we can try to find something better. You may want to remove your operator from the window so that it's easier to compare. There are some details obscured while it's still inside the window.
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