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Machine buttons on a relic control panel operating board inside an abandoned factory.

Panel with numbers and bulbs marked with numbers for manual switching of the telephone line. Old telephone exchange.

Antique illustration of a Bell for alternating currents

ZWOLLE, NETHERLANDS - MARCH 14, 2021: Lots of doorbells and name plates on an apartment building

Fire sprinkler alarm system at building exterior

Keys in lock on panel door in electricians workshop

In the fifties, telephonists were working on switchboards using manual connections

$This image depicts a collection of vintage items, evoking a sense of nostalgia and historical charm. The focus is on an old-fashioned handheld roller, possibly a printing or inking tool, resting on top of what appears to be a stack of aged books or documents. Surrounding this are other antique objects, including a small, ornate box with a wooden base and a metallic device, possibly an old-fashioned clock or telegraph receiver, that hints at the bygone era of mechanical innovation.\n\nThe setting seems to be a dimly lit room or a museum, with warm, earthy tones that add to the vintage atmosphere. The background is softly blurred, drawing attention to the objects in the foreground while suggesting an environment rich with history. Each item in this scene tells its own story, collectively offering a glimpse into the past and the tools and artifacts that were once part of daily life.$

Emergency of Fire alarm system notifier or alert or bell warning equipment use when on fire (Manual Pull Station).

A bank of electricity meters in the lobby of an apartment building in Havana, Cuba

Vintage hand drawn architectural plan circa 1982.

A closeup of indicator dials from the famous 'Bombe' machine at Bletchley Park used for deciphering German encrypted 'Enigma' messages

Installation of smoke on the ceiling. smoke detector in disassembled form. lower base. home security.

Intercom at the entrance of an apartment building

Red fire alarm switch at cement wall filter effect

Beja Airport, Portugal: sonar buoys in a rack - sonobuoys are used in anti-submarine warfare and submarine / submersible rescue, an expendable sonar system that is dropped/ejected - there are two main types, active buoys send out sonar pulses, which reflect off the submarine, and the return is datal linked back to the aircraft, passive buoys listen for any radiated noise from the submarine contact - Lockheed P-3 Orion aircraft.

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