"were historically produced" is a grammatically correct and usable phrase in written English
You could use it when you want to describe something that was created in the past. For example, "These hand-made dolls were historically produced in the early 1900s."
White heroin, which is historically produced in the "Golden Triangle" of south-east Asia, is typically both purer and more expensive than brown.
Pacharán is an aniseed liquor-based beverage made with sloe berry (Prunus spinosa L ., that has been historically produced in Navarra (Northern Spain).
We argue for a novel explanation of nuisance species as belonging to 'socio-natures' (see Swyngedowu 2004,1999, Castree and Braun 2001) that, beyond de facto ecological considerations, are historically produced and continuously reformed by networks of human and non-human 'actants' (Latour 1993).
The most common and difficult of all hazardous waste sites are those that historically produced artificial (manufactured) gas; for gas-making was international in scope and at the very core of the industrial revolution.
If one asks why we should think humans possess such worth, Wolterstorff argues that the belief that humans have this quality was not only historically produced by Jewish and Christian conceptions of the human person, but even now cannot be defended apart from such a conception.
The police were historically undermanned there.
Real interest rates were historically low.
The Kyoto Protocol agreed that Annex I countries would take responsibility for greenhouse gas reductions, since they are historically responsible for producing the bulk of CO2 emissions.
However, it has been historically difficult to produce agonists of mGlu5 that are selective for this subtype as compared to other mGlu receptors.
