Right and left closer assebly needed

A quick learner from Huntingdon Valley PA says:
I cannot see any markings. The track on the left side appears to be worn out.
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Bob from SWISCO responded:

Based on the cover design and the track, I suspect this might be the Andersen 39-094 and 39-095 Straight Arm Operators. You'll have to compare with the entire assembly with these options to confirm. For a handle that works with these operators, see our 39-286

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