Rt. Open Truth window operator w/ crank

A home owner from McKeesport, pa says:
I will try to send pics. The Truth Hardware Sash Dyad crank looks like what I need. The only infor. on my window arm was,"Truth" and 30866. What is the difference between (your) product number, 39-187 and 39-089? They look identical. Need a right hand open crank and arm. The holes are 5 inch, and the arm is 5 inch too.
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Casey from SWISCO responded:

Hello,

The difference between the two operators that you are considering is the shape of the link arm. The 39-187 is shaped like a "W", while the 39-089 is "Z" shaped. I would recommend the 39-089 based on your photos. Take a look and thanks for posting! 

Dimensions for 39-089
Dimensions for 39-089

A home owner from McKeesport, pa says:

Wow! What a fast response. Excellent information and advice. I couldn't be more satisfied.

Thank You. Bob.

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Casey from SWISCO responded:

That's great to hear! We appreciate your business and please let us know if you need anything else. 

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