An old bell.

Six Grenet batteries.

Two Leclanché batteries.

Special relays including an Increment Quadruplex one, a Kamm's patent, a Creed and a Theiler's patent (1876).

A view from above of those special relays.

A very nice and very old Bréguet galvanometer.

Telegraph switch with lightning protector.

Detail of the lightning protector element.

A tool to measure the height of the telegraph poles (based upon geometry).

A "silver" (nickel plated) and a "gold" (brass) model of a typical Italian telegraph.

A very old battery by Meidinger.

Some papertape wheels and (re-)winders.

A portable (military) Russian telegraph.

A simple signal lamp (Navy?).

A signal lamp system (WW II) used by the army. The lamp sits on a tripod.

The light signals are given with a typical military morse key.

A particular (Swiss?) key, probably used by the master in a morse training class.

Another nice Tesla system.

A dial element (goes up and down and rotates) of a Strowger exchange.

A nice (telephone) crosstalk meter by The Cambridge and Paul Instrument Cy (England).

This obvious plain telephone is an highly sought after item in Germany. The dial is very special.

Jonas is speaking through the first commercial model of Graham Bell's telephone of 1877. Lisa is listening via the first Siemens & Halske telephone of 1878. I am the telegram deliverer...

The cover of my book with a European camelback key.