This is a 2 piece set of walnut knobs from a Singer Treadle Sewing Machine. These walnut knobs are in great clean condition and can replace any of your broken or missing knobs. The tenon diameter is 3/8" and the length is 3/8". They are 1" in diameter. These were standard knobs that should be a direct replacement for yours. Singer also used smaller knobs on drawers with the fancy appliques.
Get Grandma's old beauty looking great again with these walnut knobs.