Additional comment
RIB II: The object is 18.36 gm underweight for a Roman libra (5.6%) [16.4 gm underweight, 5.04%]. It has, however, as explained in the Introduction (p.2), been widely accepted as indicating the weight of a lighter ‘Celtic’ pound. That view, with only slight hesitation, is rejected here. The Seven Sisters hoard contained many horse-trappings and five tankard-handles, all with late Iron Age decoration (C. Fox, Pattern and Purpose (1958), 127-9 with fig. 78; Davies and Spratling, op. cit. passim); but it also yielded two bells, a pendant and other fittings of typically Roman form. Moreover, tankard-handles of native type (Corcoran, Proc. Prehist. Soc. xviii (1952), 96-101) have been found at Hod Hill (Durden collection), at Colchester (Sheepen Farm) (Hawkes and Hull, Camulodunum (1949), 329 fig. 60.1) in a context of a.d. 49-61 although there considered to be residual), and even at Newstead. It is also well-established that horse-trappings and other equipment of late Celtic type were used by Roman auxiliary troops (see examples in M. Macgregor, Early Celtic Art in North Britain (1976), and, for strap-junctions, Taylor and Brailsford, Proc. Prehist. Soc. li (1985), 247-72). Davies and Spratling, however, by identifying the find-spot of the hoard, have shown that the material had probably become the property of a native bronzesmith before its burial. Nevertheless, there is no doubt of its Roman associations and of a date after a.d. 43; and with these conclusions one of the chief reasons for belief in a so-called ‘Celtic pound’ disappears (see Introduction, p.00). The Neath weight lies within the margin of error found in Roman weights, which can approach 10% (compare for instance RIB 2412.104).