Anderson casement windows need to cranks both left and right only markings are Anderson Windiow walls Bayport Minnesota on the left side crank there is a letter s and the number 109 printed on it
Tom from SWISCO responded:
September 30, 2019
Hello! Based on your photos, I recommend either our 39-094 and 39-095, or our 39-150 and 39-151. Look both pairs over and see what you think.