Guy with silvers (originally)
https://www.backyardchickens.com/t/102281/coturnix-quail-basics-information-and-pictures-galore/1660
ETA: post 1664
Perry of P&L gamebirds participated in an exchange of eggs with JMF. These are the first silvers legally imported to the US.
Perry is not however the source of the silver color phase. All silver coturnix originated from a single mutated bird in Belgium in the 70s