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Avoncroft Museum of Historic Buildings

Avoncroft 3D objects

Instructions for use
Select an object to view from the list below. To rotate either click on the rotate icon located in the bottom right hand corner of the image or click and drag within the object window.

Select an object

Ericsson Speakerphone
A/B Coinbox mechanism 1
A/B Coinbox mechanism 2
Pay on answer (POA) payphone
Renters prepayment coin collecting box
Strowger switches

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Strowger switches

The Strowger automatic switching system, designed to remove human intervention in connecting telephone calls, was invented by a US funeral parlour proprietor in 1889. It was adopted in 1922 as the standard for all automatic telephone exchanges in the UK. This electro-mechanical technology persisted for over 70 years, gradually being replaced by digital or modern electronic exchanges, until the last Strowger exchange in the UK was closed on 23 June 1995.