Pair of portable monocular microscopes 1890-1910,

(CLO0_003_3309)

Pair of portable monocular microscopes manufactured between 1890 and 1910, aimed at both academic training and fieldwork. Their modular construction in detachable brass and enamelled metal structure makes them suitable for transport and use in non-laboratory conditions, such as scientific expeditions, botanical studies, geological studies or teaching practices. They are included with a wooden box for protection and storage.

Microscope 1:

• Detachable three-segment optical tube, assembled by thread.
• Metal plate with opening for light passage.
• Lower orientable flat-convex mirror.
• Focus adjustment by displacement of the optical tube.
• No visible inscriptions.

Microscope 2:

• Side focus screw with splined wheel.
• Lens decorated with turned rings.
• Brass body with patina and surface oxidation.
• It is kept in a wooden box with a compartment adapted to the instrument.

📐 Technical and Ornamental Characteristics

• Materials: Brass, enamelled cast iron, solid wood.
• Decoration: Milled rings on objective and eyepiece.
• Design: Detachable microscopes with a simple structure, without complex optical mechanisms.
• Application: Instruments used both in academic education and in field studies due to their ease of transport and resistance.

📉 Status and Valuation

• Not tested. They retain basic optics and mechanisms.
• Visible oxidation in brass and enamel wear.
• Wooden box in functional use, with interior wear marks.
• No manufacturer marks or serial numbers visible.