Pocket Sundial by H.M.Kala ad: Kala Pocket Instruments

As a family of Austrian watchmakers we have spent over 25 years crafting the design of this solid brass and steel equatorial ring pocket sundial in the same purpose-built factory near Graz in Austria - and are proud to say that, because it measures just 60mm in diameter, it meets the official international sizing standard for pocket watches. Made out of solid brass and steel, the Kala Pocket Sundial is a contemporary take on a historical model - the original can be found at the Royal Observatory in Greenwich, London. It tells the true solar time anywhere in the world because the Sun's angle to the equatorial plane takes different values over the course of the year, and the small hole mask in the centre of the sundial is adjustable, plus set to the date. The result is surprising accuracy estimated by experts to be better than +/- 10 minutes vs. the true solar time! Further, once setup, the sundial is a model of our planet too with the bridge parallel to the earth's axis, and it can thus be used as a precise compass - making a truly versatile instrument. If you are interested in more information, just visit: https://www.pocket-sundial.com/products/kala-sundial And here are the technical specifications: - Made of solid brass and steel with artisan black ink coating (providing a reassuring weight) - Fully assembled weight: 40 g. - Ø 60 mm / 2.36 inches diameter. - Includes 10 language instruction manual. - Comes with an organic cork inlay and an elegant white slider case. - The outer and inner rings can be folded together for easy transport. https://www.pocket-sundial.com/products/kala-sundial