Artist paintbrush bearing Langnickel markings

This item is an artist's paintbrush with a dark blue or black lacquered handle. The handle is stamped with metallic gold-colored lettering that reads '10 Langnickel 5590 ROYAL SABLE USA'. The presence of these markings is stylistically consistent with brushes manufactured by the Langnickel company, potentially from their 'Royal Sable' line, though such markings represent a hypothesis that would require verification through physical examination and historical catalog cross-referencing. The brush head is not visible in this image. The handle appears to be in relatively good used condition, showing some minor surface scuffs and light wear to the gold finish of the indented lettering. The craftsmanship of the stamp is consistent with mass-produced professional art supplies from the late 20th century. Based on the marking '10', this is likely a size 10 brush, often used for medium-scale detail work or washes. Without an inspection of the ferrule and hair, the specific brush shape and material quality remain unverified.

I have examined the image provided of the artist paintbrush. Based on what I can see, the handle bears markings consistent with a size 10 'Royal Sable' brush from the Langnickel 5590 series. While the presence of these markings supports a hypothesis of the item’s origin, I cannot verify the item's manufacture from a photo alone, as marks can be misrepresented or replicated. The value estimate is predicated on the assumption that the item is a genuine Langnickel professional-grade brush; should it be a reproduction or a lesser-branded imitation, the market value would likely drop below $5. The handle appears used but stable, with minor finish wear consistent with age and professional application. However, a critical factor in determining the value of any brush is the condition of the ferrule and the hair/bristle head, neither of which are visible in the provided image. If the bristles are splayed, clogged with dried pigment, or missing, the value would be negligible. Modern demand for vintage professional-grade art supplies remains steady among practitioners who value specific historic material blends. To confirm this appraisal, a physical inspection is necessary to evaluate the bristle health and to verify that the ferrule is securely crimped. Comparison against historical catalog specifications would further support the attribution. This estimate reflects the typical secondary market range for used professional-grade brushes of this specific series and size.