Also 7 staddow. [Of obscure origin.] (See quot. 1846.)

1

1688.  R. Holme, Armoury, III. 383/2. Two Tools belonging to a Comb-maker, viz., the Turn-File, and the Staddow.

2

1846.  Holtzapffel, Turning, II. 723. The comb-cutter’s double saw … is called a ‘stadda,’ and has two blades so contrived as to give, with great facility and exactness, the intervals between the teeth of combs.

3

1875.  Knight, Dict. Mech.

4