Crank mechanisms needed, two types (right and left?)

A home owner from Arvada, Colorado says:
May 31, 2013
I have attached two pictures with measurements and cast-in numbers, I need two mechanisms with the "40471" number and one with the "L31538A" number. Please let me know if you need more information
User submitted photos of a window operator.
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Tom from SWISCO responded:
June 3, 2013
Good morning! Check out our 39-031 & 39-032 and see if either of these could work for you.
A home owner from Arvada CO says:
June 17, 2013
I just installed the crank mechanisms you suggested/sent and they work perfectly, thank you!!!
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Tom from SWISCO responded:
June 18, 2013
That's great news! Let me know if you have any other questions, I'd be happy to help.
A quick learner from Wisconsin says:
August 3, 2020

Hi Guys

Is the industry clear on handing terminology ?

I see conflicting views on the subject.

With your help I have identified the two different operators I need. Both numbers have a left and right mounting position. INSIDE the window looking out or OUTSIDE the window looking in ?

Thanks, Dave

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Tom from SWISCO responded:
August 6, 2020

Hi, Dave. This industry is anything but clear when it comes to the matter of left vs right. Every company defines it differently, and even the same company will change its mind over the years. You're better off ignoring the concepts of "left" and "right" entirely and base your decision on the design of the part in question. What side are the gears on? What side is the handle on? And the arms? Stuff like that. That's what I do and it saves me the headache.
EntryGard Dual Arm Operator
EntryGard Dual Arm Operator
39-031
$29.70
EntryGard Dual Arm Operator
EntryGard Dual Arm Operator
39-032
$29.70
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