Wrong zigzag pattern on operator.
A quick learner from Bedminster, NJ says:
June 20, 2016
Tom from SWISCO responded:
June 21, 2016
Thanks for posting. The top part in your picture is, indeed, the 39-090, which appears to be what you ordered. You received the right part, but it is not a match for your old operator, which I assume is the part on the bottom. As you mentioned, the 39-188 looks like a better match.
You can return the 39-090 for a refund and purchase the 39-188 at any time you wish.