...before I get too deep.
What is pictured above is 14 pounds of copper and amorphous in the form of some 12hy 200ma PS chokes. The interesting little additional fact is they can handle 1000Vac @ 120hz without buzzing and will be used as L1 after some 872's in a GM70 amp.
The Mullard Story - Nice and dry Brittish history of Mullard. http://www.itishifi.com