Authentic Models Brass 3 Minute Sandglass HG001

A slender and delightful brass 3 minute sand glass by Authentic models. This time piece would originally have been used by boatswains to measure the ships speed by counting knots and timing minutes. A great gift, perfect on any desk or in any study. Approx size 3.75 x 1.5 inches. (9.5 x 3.5 cm)