The information I have is that Onofrio Piacquadio and George Piacquadio, traded as Pogi and were registered at 37 Balfe St, Kings Cross, London N1. Not very far from the location of the Lohnbergs.
I don’t have much information on either of them other than Onofrio married in 1974 in St. Pancras, London to Ms. Maria L Pozzuto. They had a daughter, Silvana, who was born in December 1975, but it looks as though Onofrio died in December 1976.
Note: Unconfirmed. There is a Giorgio Piacquadio that married in March 1961 to a Ms. Maria Puzzuto??
The Pogi collection can be found here