The Swiss Singer Automatic Zig Zagger is considered to be the best zig-zagger ever produced. As its name suggests, it is Swiss quality made.
This Swiss Singer Automatic Zig-Zag Attachment Singer part 160991 is complete and in excellent condition.
There are two original manuals. The top manual in the photograph below is in German. The manual missing the cover is in English.
The Swiss zig-zagger comes with the original ten original different zigzag cogs and cog tray.
The cream colored Bakelite in both the case and on the zig-zagger is in excellent condition with no cracks in the cream Bakelite in either.
The attachment not only zig-zags and sews a straight stitch but has feed dogs so that it can be used as a walking foot.