It looks somehow wrong to be more than inspired by rather than copying, an original. Too angular, too-small chimney, too-small reservoir; for the proportions of the case.
That recalls a similar question I pondered when I repaired a carriage candle-lantern for a friend.
It may well have been reproduction but it was fully working, with its simple arrangement for keeping the candle at constant height. If genuine though I'd have guessed at no earlier than Edwardian, perhaps late-Victorian, manufacture, when mass-producing sheet-metal items was well advanced.
(The candle sat on a long but light coil spring in a vertical tube protruding an inch or so above and about six inches below, the lantern's base. As it burnt down, the spring kept its top edge held up against an inwardly-spun flange on top of the tube.)