Small clear light bulb designed for telephone systems and low-voltage indicator panels, running on 6 volts.

A small clear light bulb for telephone and control panel indicator lights that runs on 60 volts and lasts 5000 hours.

A small clear indicator light bulb for telephone and telecom equipment, rated for 48 volts and lasting 5000 hours.

A small clear 12-volt indicator light bulb designed for telephone panels and control equipment.

A small clear indicator light bulb designed for telephone systems and control panels, rated at 24 volts and lasting 6000 hours.

A small clear indicator light bulb for telephone systems and control panels that runs on 12 volts.

A small clear indicator light bulb designed for old telephone and switchboard equipment, running on 60 volts.

A small clear indicator light bulb for 24V telephone and control equipment that lasts 5000 hours.

A small clear indicator light bulb designed for telephone and industrial control panels, running on 24 volts.

A small clear indicator light bulb for telephone and control panel systems, rated for 28 volts, lasting 5000 hours.