Searching for 1960s pella casement operator 16"

Hello,

Unfortunately, I do not recognize your Pella operator. 16" is also quite long for this type of assembly. If you could show us how the end of the arm attaches to the sash, that would help us confirm if a replacement is available. Thank you! 

Unfortunately, we do not carry an exact replacement for the operator shown in your photos. We've related two operators on this page with 13-1/2" long arms, which is the longest option that we carry. See the 39-013 Truth operator, along with the 39-505 track. The track sits higher on the sash frame but I'm not sure if this would get in the way of your sill cover. 

The other operator that might work is the Roto 39-399, along with the track 39-542 track, which installs the same way as your original track. Take a look at both of these operators to determine if one of them would work on your window. Also, review the related videos shown on this page to assist you.