Brass Astrolabe Value Guide

This 20th-century brass astrolabe from India is a decorative tribute to the ancient astronomical instruments used for celestial navigation and timekeeping. While a modern reproduction, its intricate cut-out designs and traditional Arabic script make it a highly sought-after piece for collectors of scientific instruments and maritime history.

What affects the value of Brass Astrolabe?

• The level of detail and clarity in the engraved Arabic calligraphy and astronomical markings.
• Overall condition of the brass, including the presence of a natural patina versus artificial aging.
• Completeness of the set, including the number of interchangeable climate plates included.
• The structural integrity of the moving parts, such as the rotation of the rete and the alidade.

How to Identify Brass Astrolabe?

• Examine the 'rete' for hand-cut versus machine-stamped precision in the intricate star maps.
• Check for the presence of traditional Arabic script engraved across the plates and the back of the instrument.
• Verify the material is solid brass with a weight consistent with 20th-century Indian craftsmanship.
• Look for a functional 'alidade' on the back, held together by a central pin often shaped like a horse or simple bolt.

History of Brass Astrolabe

Astrolabes are ancient astronomical instruments used for solving problems relating to time and the position of the Sun and stars in the sky. Their invention is often attributed to the ancient Greeks, but they were significantly developed and refined in the Islamic world during the Middle Ages, where they were crucial for navigation and religious practices. Later, they were introduced to Europe, playing a vital role in the age of exploration. While this piece is likely a modern decorative reproduction, it pays homage to a rich history of scientific innovation.