Simplex machine, general view with rheostat attached.

Simplex Machine Co. Detail of Rheostat.

[Machine.]

Rheostat without lid.

Simplex machine.

Simplex machine.

Accounting machine.

Large machine.

Machine closed.

Simplex machine.

Simplex machine.

Small machine.

Small machine.

Accounting machine

Accounting machine.

Large machine.

Accounting machine.

Small machine.

Large machine.

Small machine.