When a building produces goods it should tell you what city level goods you will get but no one adds that information. I know most building produce unrefined goods pass Modern Era but not all so this information is important.
If you refer to the wiki, please take note that whenever a building produced unrefined goods it is stated in the wiki. It should be taken as the norm that goods produced are from the buildings age and that only devations from that form should get explicitly noted.
The only buildings I am aware of that have the behavior of producing unrefined goods are the Great buildings and the wishing well style buildings.