Postby Ahriman » Tue Nov 18, 2008 6:34 pm
Though the assumed unit of volume that unqualified punched numbers in British pieces represented was most certainly the ½ pint throughout the 19thC, and in earlier pieces (1750s-1840s) it was frequently the Gill (¼ pint), it's easier to do the maths here on the measurements provided which produces a theoretical max possible volume of 2.76 litres, in which case the "4"'s multiplier will assume a notional pint value, 4 pints (imp/common) being 2.27 litres, which is well within range to allow for internal/external measurement discrepancies and practical filling levels etc. Because of the default assumed ½ pint value in the industry, British makers usually would punch 'pt' or the full word itself behind the numerical value, or 'qt' or the full word 'quart' if those larger measures were being used.
(To heighten the fun, in sets, if the teapot was punched, let's say, '6' for 3 pints, many manufacturers would punch the large companion pieces (coffee and/or hot water), *regardless of their actual capacity*, with a '6' as well, in strict analogy with the teapot. This can cause present day bafflement until the McGuffin at work there is spotted. <gg>)
Thanks for the amiable kicking of my shins! :-)) Had I taken more conscious note of the actual measurements first time round, it should have been clear to me that the older ½pt default value could not be apposite here: isn't it amazing what a second look can do..?! :-))
Thanks again, and all the best