Anderson window, casement operator, installed in 1973.
A quick learner from Minnesota says:
June 11, 2020
Need six operators. Three left and three right.
Bob from SWISCO responded:
June 16, 2020
This older style Andersen operator is no longer made, but see our 39-094 and 39-095. You may be able to use these as replacements. Look them over and see if you agree.