Vintage Singer Automatic Zigzagger in Original Box

Reposhing this item I purchased from @blendedchest. in excellent condition but is incompatible with my machine model. This attachment is for slant shaft Singer machines. I believe this includes Singer 301, 401A, 403A, 404A, 401G, 411G, 500A, 503A, 600E, 603E, & 604E, all of which used the same steel gears and direct drive motor. But please verify based on your own research or manual. Questions? Leave a comment below!