Anne — Limited experience can leave you with erroneous impressions. Before I started browsing the internet for them, I thought
all toddy kettles had glass handles, and even when I saw my first hardwood handle, I assumed it was not original, but a replacement for a damaged glass handle, made by the owner's local furniture maker.
It looks to me as though fruitwood and glass handles were the standard options, with ebony handles as the luxury version at a premium price, but that's only an informed guess.
It would be most helpful if these handles appeared in an early Sowerby trade catalogue, but this is unlikely, as listing specialist trade goods, only sold to perhaps three or four Birmingham metalbashers at the most, may have been regarded as an unprofitable waste of space.
... and, as glass handles only seem to have been used on toddy kettles, is this evidence in favour of Sowerby (or whoever made them) keeping costs down by shipping them directly to wholesalers in Scotland for fitting to the kettles?
Bernard C.
