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Tann's seven inch reliance-guarded seven lever one-sided detector dead lock

Tann's seven inch reliance-guarded seven lever one-sided detector dead lock

circa 1843

Chubb's five one-sided six leaver detector rim dead lock

Chubb's five one-sided six leaver detector rim dead lock

circa 1844

Type M555 5 - lever mortice dead latch

Type M555 5 - lever mortice dead latch

Eight inch five lever one-sided rim dead lock

Eight inch five lever one-sided rim dead lock

Eight inch one-sided dead lock

Eight inch one-sided dead lock

1830

Tintan double cylinder security mortice deadlock

Tintan double cylinder security mortice deadlock

The Science Museum Group

Locomotion
Locomotion
National Railway Museum
National Railway Museum
National Science and Media Museum
National Science and Media Museum
Science and Industry Museum
Science and Industry Museum
Science and Innovation Park
Science and Innovation Park
Science Museum
Science Museum
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