Trade seems to be very important in both Essos and Westeros and we see different entities vying against each other for mercantile supremacy such as the Free cities, Slaver cities etc.

For trade, there have to be products. So naturally, surplus and efficient production means that the state with those characteristics will gain a massive share in the mercantile monopoly. These can be created by forming an industry with focus on a certain kind of goods i.e. 300 skilled smiths working for one employer together as a team to produce swords.

We know there are some guilds such as Tourmaline brotherhood, ancient guild of spicers, the thirteen etc. But they appear to be more like councils/alliances of traders who buy goods from local producers and move them around.

Hypothetically, it is very plausible that some rich merchant might decide to produce goods in an industrial fashion i.e. hire/buy some pot-makers to make fancy pots for him to fill the market with. So based on that hypothesis, are there any industries that we know of in Westeros or Essos?