An Early 20th Century Mother-of-Pearl Mounted Folding Pocket Knife by Arnerias.

An Early 20th Century Mother-of-Pearl Mounted Folding Pocket Knife by Arnerias. This refined folding pocket knife, dating from the early 20th century, exemplifies the elegant utility of Edwardian-era personal accessories. The handle is composed of two lustrous mother-of-pearl scales, prized for their natural iridescent sheen, which are expertly secured to the internal steel liners by delicate brass pins and finished with rounded bolsters. The knife features a versatile multi-tool configuration, including a primary spear-point steel blade, a smaller secondary pen blade, and a folding nail file with a textured surface and a pointed terminal. The ricasso of the primary blade is clearly struck with the maker's mark "ARNERIAS" above the numeral "21," denoting its specific manufacture and model. Such sophisticated implements were typically carried as part of a refined gentleman's or lady's daily equipage, where the choice of exotic materials like mother-of-pearl signaled both taste and status. The compact design measures approximately 7 cm in length when closed and reaches an overall extended length of roughly 15.5 cm when the primary blade and file are fully deployed. The item is in good condition.