Definatley a pre-WWII flashlight type. A variabe of types of flashlights were standard stocked item in all Navy Departments, available from all supply depots. The US navy procured lights from companies such as Winchester, Usalite, Bright Star and Eveready, to name a few.
The metal bodied two-cell types were being phased from service being replaced by celluloid bodied types.
Flashlights were maintained on most all vessels and aircraft, to include fixed ground stations. Think of flashlights as an emergency tool stored near fire extinguishers and first aid kits in any area were blackouts may occur. Flashlights were such a staple and very common.
Example: Here, on the USS Hancock, personnel are attending a wounded individual below decks. To assist in low light conditions, Battle Lanterns and a flashlight is being used to assist. The light is similar, maybe same brand, Usalite made a whole lot of different body patterns.