Full size marine sextant by 'C. Plath, Hamburg. No 45369 Germany'. The scale reads to 120 and the vernier has a micrometer drum wheel for fine adjustment. Both mirrors are excellent, also the shades. The bakelite handle has a battery compartment and a push button. A wire runs from the handle, up the arm to a bulb, held within the vernier compartment. This is to give light to the vernier when reading the sextant at night or in poor light. There are no batteries in the compartment so I d...on't know if the bulb works.Very nice condition with some enamel loss within areas. The bakelite case holds a lock (no key), certificate dated 5th Oct 1967 and a mirror adjusting spanner.