P-block staging entry validated for model fit. Imported from staging batch duell-thimm-p, source entry 1669.
Normalized as A.-J.-J. Possellier dit Gomard's 1847 bayonet treatise. The earlier local shell preserved only a thin generic title, but Gelli and later sale and facsimile traces confirm the fuller title, the Gomard attribution, and the witness with 36 plates.