"Voltona" standard soundbox.
"Voltona" de luxe soundbox.
Stentorphone soundbox for playing Hill-and-Dale (old type)
1912
Experimental small cone diaphragm soundbox
1912
Stentorphone soundbox for playing Hill-and-Dale records
1912
Experimental aluminium cone diaphragm soundbox made by H.A. Gaydon.
1912
