By RT. Mason Ltd. Hunter style 'locket' compass with white metal case. Approx. 45mm diameter. Normally the cover opens when the bow ring button is depressed. The bow on this example is a replacement hence the cover has to be manually opened. Once released from the catch it springs open as normal. Shows wear and use but in working order. Engraved with manufacturer details, war department broad arrow and 1915 date. Stock code M17414.