Soundscriber machine for playback.

[Machine.]

Simplex machine.

Accounting machine.

Large machine.

Small machine.

Simplex machine.

Simplex machine.

Small machine.

Large machine.

Simplex machine.

Machine closed.

Accounting machine.

Small machine.

Small machine.

Large machine.

[Machine room.]

Berg surfacing machine.

Machine with rheostat.

Berg surfacing machine.