Electrical and Scientific Apparatus

Owner

LEADBEATER, JOHN TIMOTHY

—
DOOR SENTINEL

Electrical and Scientific Apparatus

Owner

LEADBEATER, JOHN TIMOTHY

—
DOOR-TRAFFIC CONTROLLER

Electrical and Scientific Apparatus

Owner

LEADBEATER, JOHN TIMOTHY

—
COURTESY DOOR LIGHT

Electrical and Scientific Apparatus

Owner

LEADBEATER, JOHN TIMOTHY

—
DOOR TRAFFIC SIGNAL

Electrical and Scientific Apparatus

Owner

LEADBEATER, JOHN TIMOTHY

—