Possibly for use by employees of a naval dockyard or other military installation, either on board ships or in the shipyard - for meals, drinks, public transport...
There are numerous Swedish tokens issued by shipyards (civil and military) which were used in these ways. Most of the Gothenburg ones (civil shipyards) are connected to public transport, where the shipyard subsidised its employees' journeys to work by buying specially produced tokens from the ferry operator at the standard price and then selling them at a reduced price to employees. Those used elsewhere (principally Stockholm and Karlskrona for military, Malmö for civil) seem to have been for internal use, e.g. canteens.