Rare MITAC Polished Aluminum Classroom Gyroscope

Manually manipulated blue and silver anodized aluminum gyroscope composed of two gimbal rings, a central rotor, spine axle, frame and base (ca. late 1940s/early 1950s, USA). The rotor in this case is a cube representing azimuth - the angle between North, measured clockwise around the observer's horizon, and a celestial body (sun, moon). Hence, the presence of both "N" and "E" compass directions on the rotor. The gimbals denote "elevation" and "roll." Interesting piece which serves as both scientific tool and modernist decorative object...

A machined gyroscope presented to Allen G. Shenstone (1893-1980) physicist and chair of the department of Princeton from 1949-1960. Presented by friends in the department. 7 inches...

From the U.S. Navy, this awesome prismatic beacon has the most incredible lens you will ever see. Polished aluminum pole mounted high power nautical range light. Fitted with huge cut...

The Vulcano Aluminum "Démarreur" Lighter Made in Eritrea, Africa is a rare collectible from Wartime WWII production. It is crafted from machined aluminum with tortoiseshell cataline ...

An exceptional example of mid-20th-century naval navigation technology, this U.S. Navy Bureau of Ships Self-Synchronizing Alidade Pelorus Stand was manufactured by the renowned Sperry Gyroscope Company, Brooklyn, New York, a key supplier of precision instruments for the U.S. military. This instrument, Mark XXXI, Mod 0, Serial No. 320420, was built under Navy contract NXss 17019 and bears its original inspection tags, confirming it passed rigorous Navy testing before deployment. The pelorus stand is crafted in a striking combination of polished aluminum and solid brass, featuring a protective domed brass cover that reveals a beautifully preserved gyrocompass repeater dial. Designed to interface with a ship’s gyrocompass, the self-synchronizing mechanism allowed navigators to take precise bearings on landmarks, celestial objects, or other ships—critical for accurate positioning before the advent of modern satellite navigation. This piece reflects the height of WWII and early Cold War-era maritime engineering, used aboard larger Navy vessels to aid in navigation and fire control plotting. Sperry Gyroscope was synonymous with precision during this era, and their equipment remains iconic among naval historians and collectors. The instrument retains: • Original builder’s plate...

Antique early to mid 20th century double sided hanging map titled the New Commercial and Census Map of Illinois, Edition 1073. Verso shows the National Map of Chicago and Suburbs - O...

Vintage Nystrom 16" Large Raised Sculptural Relief Classroom Double Axis World Globe. Circa Late 20th Century. Measurements: 21" H x 18" W x 18" D.

This set took me over 20 years to procure.....Dont miss this opportunity!!!!Being offered extremely rare collection of aluminum string instruments,,string bass, ,cello,,and violin....... circa 1930s, all 3 instruments originaly wood grain painted, have been stripped and polished.. re-strung and set up, new bridge and custom (alcoa) tail piece, original ebony fret board, All play and Sound amazing. If purchasing to play, wonderful decorative sculpture, Pfretzschner aluminum bass In 1928, The Aluminum Company of America manufactured 50 aluminum double basses...

Pair of American polished aluminum bulls eye nautical wall lights with protective front cages and rear mounting brackets. Pair has been electrified with a single socket for bulb, 20t...

Set of 28 Geometric Bakelite Bauhaus Science Classroom Crystal Models, Prague, 1930s Exceptional and rare set of twenty-eight geometric crystal models from a Czech science classroom...