This is a Y-O-Lite made by Meikosha & Co. Ltd. Tokyo. I only have one catalogue for Y-O-Lite from about 1937 copied to me by Bo Ryman which doesn't show this lantern so I can't give you a model number but it may be a variation of their model K which is a 200cp kerosene or gasoline lantern. Here are all the lamps from the 1937 catalogue. ::Neil::