By the General Electric Co. Approximately 12.5 x 10cm. Mirrored glass with central sighting cross and instructions for use printed to one side. These were included in several of the life-raft kits, the C-1 survival vest, and the types E-5, E-11 and E-12 emergency kits. String lanyard absent. Good used condition but has surface wear and scratching. Stock code S18391.