Vintage Marbleized Burgundy and Black Fountain Pen or Mechanical Pencil

This appears to be a vintage writing instrument, either a fountain pen or a mechanical pencil, characterized by its striking marbleized body. The primary colors of the body are a deep, rich burgundy and black, swirled together to create an attractive, organic pattern. The overall shape is tapered at both ends, with a slightly wider middle section for comfortable gripping. The cap and barrel are adorned with several gold-toned accents. There is a prominent gold-colored pocket clip attached to the cap, which shows some signs of wear and possibly minor tarnishing, consistent with age and handling. Near the joint between the cap and the barrel, there are two thin gold bands, and another slightly wider gold band on the cap itself. The tip of the writing instrument, visible at the far right, is also gold-toned, suggesting it could be a nib if it's a fountain pen, or the lead dispensing mechanism if it's a mechanical pencil. The material likely consists of a type of resin or celluloid, common in vintage pens for its durability and ability to mimic natural stone patterns. The finish appears glossy, though some faint surface scratches or scuffs might be present from use. The craftsmanship suggests a mid-20th century piece, potentially from the 1940s-1960s, given the materials and design aesthetic. No specific maker's marks or inscriptions are discernible from the provided image, which would be crucial for a definitive identification and valuation. The uniform wear on the gold-toned elements and the overall presentation suggest it has been used and cherished.