This is a set top high quality Single Right Toe Knurled and Teeth bottom Welt Piping Foot for ADLER 67, 68, 167, 267CL Industrial Walking Foot Machines.

There is an INSIDE Foot and an OUTSIDE RIGHT TOE Foot. Both feet have a 3/16" (4.8mm) GROOVE cut into their bottoms .

INSIDE FOOT #067-22-068-3 

OUTSIDE FOOT #067-22-076-0