The public account of the copper weight relies on the assay slips, stamped weights and the merchants’ challenge book. A review of that source and the field notes finds a specific limit: the count can be repeated, but it does not include a shallow notch on the old standard weight where a maker’s mark has worn smooth.
Nima Thol checked the assay slips, stamped weights and the merchants’ challenge book against the field notes. The method is to put the posted price beside the amount that actually changed hands; it confirms the entries, but not every interpretation attached to them. The comparison covers 32 bars checked against the common weight; 33 appear in the prior file. No signed correction to either entry was present when this review closed.
Ola Senn, licensed copper assayer, said the source register was complete for its stated purpose. The office has not provided a separate measure for whether the market should replace one shared standard or allow each guild to keep a certified weight, so the public record cannot yet show which account is more representative.
Guilds say one standard hides differences in bar shape; buyers say multiple standards make a fair comparison harder. The current record does not settle that disagreement. This report does not establish that either side misstated the evidence. It establishes that the published total is narrower than the conclusion being drawn from it.
The responsible office has offered a limited remedy with an end date for review. The entry belongs to the annual return file at the assay table in the Lower Market Hall. The assay table will test both systems against the same set of bars. The next file should preserve the original entries and explain any change in method.
