Help with 100 year old window

A quick learner from U.S.A. says:
My house is 100+ years old and we have a window in a bathroom, actually, above the tub and in the shower. So, it has seen better days.

The window is an awning type and is about 25.5 " high and about 24" wide and has a single arm crank casement type opener on it. The opener will only open the window a few inches now.

The opener is marked "John R Guffman, Mfg. Company, Chicago, Patent Pending".

I assume this is also 100+ years old. Attached are a couple of photos.

I am going to do some maintenance (paint, etc.) to the window and now is the time to get a new opener, one that opens the window farther - 8", or so.

Will 39-433 work? Your advice is appreciated.
Thumbnail of the uploaded file named old casement operator.jpg
Thumbnail of the uploaded file named old casement operator 2.jpg
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Tom from SWISCO responded:

Our 39-433 might work if you're handy, but it's probably going to take a lot of work adapting the sill to accept this style. You may be better off with something like the 39-370, which looks similar in design to your original.

A quick learner from Bedford,MA says:
Thanks for the advice.
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