Can I use 39-410 & 39-411 as a replacement?

Question

Time ago I saw in the internet that this operators might work for marva security windows Theses are the pictures I have of that actual operator. Unfortunately, they are all rusted and I cannot see any numbers in any of the parts. The height is 4 1/2 inches and at the center, the width is a little less than 2 1/2

Please let me know if there is an alternative that I can buy at least one to try them and then the rest that I need in a separate order if they work. Thanks

Please let me know if they would work with it.

Tom · Accepted Answer

It's very hard to identify what you have. Do you have an undamaged version of this operator that we can see, perhaps on the opposite side of the window? The hole pattern is a very important detail but I cannot make yours out as it appears the bottom tab has broken off.

The major details to consider are the hole pattern, the spacing between the holes, the size of the link arm, and the style of the link arm such as the type of hole at the end and its mounting position in relation to the gear arm.