British Time Fuze No. 400 Mk II N

Time fuze for naval use on star shells. Interwar era (late 1920). Simple construction with brass fuze cover in very good condition. Very similar to the British No. 198 time fuze but different time ring configuration internally. Nicely marked, manufactured by NCR (National Cash Register) and dated 3-42 (March 1942). Empty and inert.