Here are 13 detail photos of a Lux No. 16: identical in capacity and features to the No. 1. The Lux catalogue from 1913 (the latest we have here) seems to indicate that the tank of the No. 16 (at that time, at least) was a bit heavier, but this one is a bit lighter than an otherwise identical No. 1 I have. This No. 16 is exceptionally well preserved: it still possesses its original burner, elaborately-cast top ring (still with traces of gold paint visible), "globe" filler cap (which appears in no Lux catalogue up to 1913, the year before the takeover), dimpled spirit cup and pump, so it gives a good idea of one of these models in its original state. See the photos. I'm not sure whether these Lux stoves are made before or after the Optimus acquisition of Lux in 1914. In profile and detail they do not resemble the products of either Lux or Optimus around this time; however, they share many features with the Optimus stoves from about 10 years later, leading me to wonder if Optimus retained use of the Lux brand post-1914, and for some time thereafter.