Monthly Consular and Trade Reports, Report by Consul Robertson on the Manufacture of Fire-Arms in the District of Verviers and Liege, 1885
https://books.google.com/books?id=7EhJAAAAMAAJ&pg=PA136&lpg
States the lopin was stacked by the barrel maker, then sent to the rolling mill.
Also a report of worker's earnings and cost of materials and rolling.

No doubt generic Damas Crolle was made in big batches by the rolling mills for supply to the many "rough forged tube" and finished barrel makers.

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