A bog standard pre-WW1 external NRV Optimus Patent No.1 to complement the several collapsible Traveller variants of this stove which already grace the gallery. This standard No.1 is still in remarkably good shape despite its age. The main work that needed doing was several major decoking sessions on the burner before it would comeback to life again. But now, at last, its burning not too badly at all. Early features worth noting, in addition to the external NRV lay-out, include the very simple presentation of the legends on the filler cap, the absence of any inscriptions other than the Optimus globe on the tank sides, and the tiny 'pine cone' pre-heat spirit cup.