Attachment 247331Attachment 247330Just picked up two Gillett tto's from an estate sale. I don't know anything about them. Neither is a adjustable, one has a knurled handle and feels very light. The other is a checkered handle that is wider at the part you turn to open. It feels heavier than the knurled one. They are both stamped on the bottom of the head "reg us pat off Gillett made in usa" The knurled one also has a Y and 4 stamps. The other has D and 1.