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En este trabajo se analiza el fragmento de una espada con posible sello de Masuria hallada en el NE de Polonia. Fue encontrada cerca de una necrópolis romana de la Cultura Bogaczewo. Tipológicamente es una espada romana. Sin embargo, los resultados de los análisis metalográficos sugieren que fue fabricada o bien con un limpio hierro forjado (o hipotéticamente con hierro fundido) o con acero preindustrial (Bessemer, Thomas, Siemens-Martin, etc.). Por otro lado, la composición química de la misma implicaría el empleo de acero pre-industrial. Para concluir, se sugiere, con cautela, que la espada puede ser una espada antigua, pero esta conclusión solo puede verificarse si aparecen hallazgos similares del periodo romano.

Archaeological investigations carried out at the early medieval cemetery in Ciepłe
in northern Poland have yielded arms and equestrian equipment deposited in chamber
graves belonging to the local elite. This study is based on elements of equestrian
equipment and horse harness which were found in graves 35, 42 and 43. Based on the few
metallographic analyses of European iron spurs, stirrups and bits dated between the 10th
and 11th centuries, it may be suggested that the artifacts from Ciepłe were forged from
bloomery low-carbon metal with low to medium phosphorus content. The objects and their
parts (bits) are single- and multiple-piece forgings of varying degrees of complexity.
The greatest skill was required in the manufacturing of stirrups, which in the case of
the Ciepłe set are all composite products, each welded from two or three pieces of iron.
Also included in this group are the bit sides from grave 43, both of which were made by
joining together two chunks of metal. The remaining items, i. e. mouthpiece links, side
plates, rings of horse bits, spurs, separators for stirrup leathers and bridle ferrules
are hot formed objects, forged from single pieces of iron. All of the non-ferrous metal
decorations of the equestrian equipment and horse harness were made in the so-called
false damascening technique. The surface of the plating was also sometimes decorated
with an additional negative drawing, sometimes lavish and rich in detail.