细节
An EMG gramophone
with Mark IX case adapted for Mark X sound conduit, Mark Xb horn, four-spring soundbox, spring motor and papier-mache horn -- 29½in. (75cm.) diam, circa 1935
with Mark IX case adapted for Mark X sound conduit, Mark Xb horn, four-spring soundbox, spring motor and papier-mache horn -- 29½in. (75cm.) diam, circa 1935