need crank and cover for window operator

A quick learner from Charlotte says:
The operator is grey metal and has a marking that looks like with a triangle overtop of a line on it. The operator spline piece is on the left side. There is a number on it, but it is extreamly hard to read, the best I can tell it sais ?198?420 best guess maybe a 4 and 7 respectively for the ?. The window was ordered custom from home depot.

Please let me know if you have any info.
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Manuela from SWISCO responded:

Hello. Just by description, there is not much I can tell you about your hardware. With you mentioning that the window was a custom made part, I can't say for sure whether or not the hardware was custom made for the window as well. But, we'd still like to do our best to help if we can. Is there any way you can forward us over some photos of the pieces in question? We'd like to have a look to see if we can offer a suggestion on a replacement. 

A quick learner from Charlotte says:
Here are some photos, I hope this helps...
When I say custom, I mean semi-custom. The window was ordered from home depot and is American Craftsman.
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Tom from SWISCO responded:

Semi-custom in this industry usually still means custom, unfortunately. There may be a chance we can't help. I'll do my best.

The good news is that your pictures are getting us on the right track. We have several operators with this same style base. The base only tells half the story, though. In order to narrow it down further, we'll need you to open the window as far as it can go and show me a clear top-down photo of the whole mechanism, including the arms. 

Honestly, seeing the operator fully removed from the window would be best. That way we won't have to worry about any important details being obstructed.

A quick learner from Charlotte says:
Ok, so I finally found a crank that could open the window. the other ones I found were too small. so I'm guessing this is a 3/8"?

Anyways, attached are the pictures of the open window.

Thanks!
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Dave Sr. from SWISCO responded:

You have an old style Ashland operator which might not be available anymore. We couldn't find these anywhere, at least. That said, I do have a few suggestions. 

Take a look at the 39-239B operator first. This looks similar to yours, but to get it to work you would also need to use the 39-536 pivot shoes along with the 39-556 track and 39-451 handle cover. The only doubt I have is whether you have the room and spacing to install the track or clearance for the 39-536 pivot shoes. 

Another operator that's similar is the 39-083 and a 39-170 sash bracket, which looks similar to yours.

Lastly we have the 39-393 which takes the 39-340 sash bracket. 

I personally have not replaced your type of operator and I'm not sure if the types I recommended could be used. However they are, I believe, the best options we have. 

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