My featherweight also came with a zig zag attachment. It wasn't a standard accessory with the machine and the original owner would have bought it as an extra or been offered it as an incentive to buy the machine. The zig zag attachment is black and reminds me a little of the older style buttonholers. The width of the zig zag can be adjusted much the same way as the buttonholer. I'm quite sure my zig zag attachment would fit your machine too as they are both low shank machines. Like the buttonholer, the zig zagger moved sideways not the machine and screwed onto the shank after the foot was removed.