Telenorma Large Station Clock TN | 1950s German Factory Clock, 65cm, Quartz Movement
Telenorma Large Station Clock TN | 1950s German Factory Clock, 65cm, Quartz Movement
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A genuinely large German station clock by Telenorma (Telefonbau und Normalzeit), 65 centimetres across, once part of a synchronised network of clocks across a station or factory. Freshly finished in satin black with a white bezel and converted to a self-contained, high-torque quartz movement.
At a glance
| Brand | Telenorma (Telefonbau und Normalzeit) |
| Model | Secondary clock (slave), factory wall clock |
| Origin | Made in Germany, circa 1950s |
| Body | Freshly painted satin black, white bezel |
| Cover | New plexiglass cover |
| Movement | Converted to a high-torque quartz mechanism, single battery (not included) |
| Hands | Original hands modified to fit the new mechanism, classic spade-style pointers |
| Diameter | 65 cm (25.6") |
| Depth | 9 cm (3.5") |
| Availability | One of one, once sold this exact piece will not return |
| Import duty | Payable by the buyer in their own country |
How slave clocks worked
Clocks like this one were never meant to keep time on their own. In a station, factory, or large office building, a single master clock, precise and centrally located, sent out an electrical pulse at a fixed interval to every slave clock wired into the same circuit. Each pulse advanced the hands by a single step, so a clock at one end of a platform and a clock at the other end always agreed, down to the minute, without either of them containing any timekeeping mechanism of their own. Install enough of these around a large site and you could guarantee that every clock a passenger, worker, or visitor looked at showed exactly the same time, a genuinely important thing to get right in a place where trains had to run to schedule and shifts had to change on the hour. Telenorma, and companies like it across Germany and Britain, built entire product lines around this idea, supplying the large dials for platforms and concourses as well as the smaller versions found in offices and workshops throughout the same building.
The story
Telenorma's roots go back to 1899 and a Frankfurt company founded by Harry Fuld, one of the first in Germany to rent out telephone systems rather than sell them. The company's name comes directly from its second major business line: supplying the German railway with synchronised "Normalzeit," standard time, broadcast from a central transmitter at its Frankfurt headquarters to station clocks across the network. That side of the business grew into the master and slave clock systems the company became known for, installed throughout German railway stations, factories, schools, and post offices for decades. The company took the name Telenorma in 1968 and later became part of the Bosch group.
This particular clock, at 65 centimetres, is a large-format example, the kind that would have hung somewhere with real visibility, a station concourse, a factory floor, a platform. It has been freshly finished in satin black with a crisp white bezel and fitted with a new plexiglass cover, giving it a clean, confident presence for a wall. Because the network of master clocks it once relied on no longer exists, we converted the movement to a high-torque quartz mechanism running on a single battery, modifying the original hands, including the classic spade-style pointers instantly recognisable from German railway clocks, to fit. Set the time once, and it keeps it on its own from there.
Suited to collectors of German industrial and horological history, interior designers looking for a genuinely large-scale statement clock, and anyone furnishing a loft, office, or open-plan space where a piece of this size can actually be seen and appreciated.