Vintage Singer ZigZag Attachment #160620 Zigzagger with Original Box and Manual

Description

Vintage Singer ZigZag Attachment #160620 Zigzagger with Original Box and Manual.  Box and manual have some wear as seen in photos but all pages seem to be intact in the manual. The attachment is missing the edge guide & screw & the slotted clamping screw that fits into the shank.  I have no idea if this attachment is operational as I really know nothing about these vintage attachments so selling as is.  Bought at an estate sale.
Please view all photos carefully as they are part of the description and please feel free to contact me if you have any questions.   I try to ship my items the same day after payment is received or the next business day. I try to pack all my items with care and try to describe them as honestly as I can. Thanks for viewing