A cased Victorian naval station pointer or three arm protractor by Henry Hughes of 59 Fenchurch Street, London.Used for coastal navigation, this superbly crafted brass station pointer has a circular silver scale with central indented cross bar for fixing a central position on a map. The central arm is fixed to a first coastal position whilst the two outer arms are fixed to two other coastal positions with the use of a sextant. The triangulation of these points would have allowed for accurate positioning whilst a vessel is nearing landfall. This quality example has the addition of two beautifully engineered drum micrometers for adjusting the angle of the outer arms and three brass extending arms which may be screwed to the main unit for measuring longer distances or for larger scale maps. The station pointer is complete with its original mahogany box with original fitted and baized interior and has a working replacement key. Inside the box is an ivorine name plate for H Hughes & Son...