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« Last post by glebe on Today at 03:35:26 am »
As implied in the original post these charts basically follow Entwistle’s classification scheme and, in particular, his dating of the various types.
However, I am sure I am not the only student of these weights who finds the conventional dating scheme less than convincing, and so I’m going to stick my neck out and propose some modifications to that scheme.
Unfortunately, there are virtually no weights (of the commoner types at least) which can be securely dated, but nonetheless there are a few clues that we can appeal to.
First, we need to realise that in the earlier centuries of the Roman empire a fundamental change took place in nature of commercial weights.
Firstly, in the Roman world the standard stone barrel weights were replaced by bronze barrel types on the same weight standard. It’s difficult to pinpoint exactly when this transition took place but it seems to have been underway by the 2nd cent. AD, at least for important standard weights in Rome itself.
Secondly, in the Greek speaking world the ubiquitous lead weights on various Greek scales were also replaced by bronze weights on the Roman scale. Here we can date the transition fairly closely, since the dated lead weights disappear abruptly in the latter part of the 3rd century.
One more transition is of key interest here, namely the adoption of Christianity by Constantine in the earlier 4th century.
Putting these various factors together suggests that the ordinary Entwistle type A barrels date from the 2nd or 3rd cent. to various uncertain dates, depending on the location. (For example it seems likely that barrels were used in Spain after its reconquest by Justinian).
We also note that the Entwistle Type D (Imperial figures) types show no Christian symbols, suggesting that they date from the 3rd to the early 4th century, in (presumably) Greece and Asia Minor.
For similar reasons we can date Entwistle Type E (‘’SOL”) types to the same period, in primarily North Africa and the Levant, judging from local museum holdings (check Pondera).
Beyond that we can only guess although obviously the Christian symbols on the later types put them after Constantine.
So, we might put the small cross types in later 4th and early 5th centuries, with the arch types (Type F) and wreath types (Types I & J) in the 5th cent.
The cruder diisc types would then go in the 5h and 6th centuries and the well made Type K discoids in the 6th & 7th centuries, with the Type L’s in the 7th.
Ross G.