Electrical connector block from the Parriss rolling-ball free pendulum clock
Electrical connector block from the Parriss rolling-ball free pendulum clock, by E. G. Parriss, Nuneaton, England, 1944-1947
Electrical connector block from the Parriss rolling-ball free pendulum clock, by E. G. Parriss, Nuneaton, England, 1944-1947