I have a random bound volume of about WW1 vintage, of Model Engineer. In it, one correspondent describes how he re-cut his kitchen tap seat.
Essentially he made something like a Keats Angle-plate from wood and bolts, to hold the lower half of the tap on his lathe face-plate.
Obviously he cannot have had a Mystery Tool, Taps, Domestic, for the Re-seating of.
The taps of his day were simple bib-cocks whose upper half could be unscrewed from only just above the seating. He probably had only one, cold, tap – and possibly in the whole house, not just on the scullery's porcelain sink – so not worth the cost of a Mystery Tool, ditto, when he already had a lathe.