If you have a Truth Window Operator stamped with 21550 on the linkage arm then you have the Truth Split Arm Operator Wi5905. We have them in stock in White.
![Truth window operator stamped 21550 is the split arm operator Wi5905 Truth Casement operator stamped 21550](https://d3hqzts0l52if3.cloudfront.net/wp-content/uploads/2012/07/wi5905_mst-150x150.jpg)
The above operator is stamped 21150 on the arm to the far right. This the Truth Split Arm Casement Operator Wi5905, the Left Hand operator is shown in the picture.
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