Anderson Windows Concealed Casement Operator Left Hand
A quick learner from La Jolla, Ca says:
October 23, 2020
Anderson Window Company's Left Handed Concealed Casement Operator with cover needed. First portion of arm is 5" second is 3 1/4" 18 7198-17. On bottom of operator 13 stamped on 1st arm, 7198-8 on second
Tom from SWISCO responded:
October 28, 2020
Hello! Please see our 39-147 and 39-145 Andersen operators. I believe these are just what you were looking for.