Antique brass optical lens from the late 19th to early 20th century, suitable for collectors, restoration projects, and wet plate photography. The lens has a solid brass construction with a side mounted focusing mechanism that operates smoothly. All glass elements are clean, without scratches, haze, or fungus. Technical specifications: • Front element diameter: cca 55 mm • Total length: 107 mm • Optical condition: clean glass, no defects • Mechanical condition: smooth focusing movement • Markings: no manufacturer engravings This lens is well suited for wet plate photographers looking for character optics with vintage rendering, as well as for decorative use, display, or integration into custom camera builds.