antik.it/Antique-compasses/3626-Aircraft-compass-1940s/
153201317114734Code 3626 Aircraft compass 1940sAeronautical brass and aluminum compass fixed on wooden board signed NISTRI OMI Rome '40s; this is a gyro compass, immersed in a viscous liquid (white oil) which tends to maintain its axis of rotation oriented in a fixed direction. A magnifying glass fixed on the transparent part of the compass allows an accurate reading. Very good condition fully functional. Measures 8x11 cm - inches 3.14x4.33.
The gyroscope is a wheel that due to the rotation tends to maintain its axis always with the same orientation.
If the axis is braked by immersion in a viscous liquid, you will have a resistance that will gradually bring the axis in the same orientation in a north-south direction.
Because the operation of the gyroscope is linked to the slow rotation of the Earth, if the ship or airplane on which is mounted too rapidly changes its direction, operation is disturbed.
The Nistri Optical Mechanics was an Italian factory of instruments for photogrammetry, established in Rome in 1926 by Umberto Nistri, and that reached its peak in the years 60/70. Since the '80s it became part of Agusta and the division that produced instruments for aerial photography was divided into SARA Nistri and Aerofotogrammetrica Nistri. Because of the gradual abandonment of the family, the company went through many vicissitudes.
FAQ
Do you provide an authenticity certificate/expertise?
Of course! The legislative decree n. 42/2004 stipulates that who sells works of art or historical and archaeological items has the obligation to deliver to the purchaser the documents attesting to the authenticity of the object, or at least to submit the documents relating to the probable attribution and origin. Antik Arte & Scienza provides an expertise (as warranty) that contains a description, period and assignment or the author, if known, of the item.
How can I pay?
Secure payments by PayPal, credit card or bank transfer.
What are the shipping terms and the delivery schedule?
Shipping by DHL or UPS is free (but if we are shipping to a country non-EU remember that any taxes and customs duties are on your expense), and items will be sent just after receiving of payment.
Italy: delivering on the average in 24 h.
Europe: delivering on the average in 2/3 weekdays.
Other countries: delivering on the average in 5 weekdays; custom duties charged to the buyer.
Is shipping insured?
Of course! Free insurance by Lloyd's London that covers almost all destinations.
If I change my mind, can I return the item?
Of course! (see our general terms for more information).
e-Shop
Antique compasses
Code 3626 Aircraft compass 1940s
Antik Arte & Scienza sas di Daniela Giorgi - via S. Giovanni sul Muro 10 20121 Milan (MI) Italy - +39 0286461448 - info@antik.it - www.antik.it - Monday-Saturday: 10am-7pm
