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bth catalogues

bth general catalogue
Circa: Early 1950s
This book of BTH's electrical items included a brief section on street lighting.
Highway Engineers' Reference Book 1947
Circa: 1947
Some of BTH's lanterns and their uses were covered in this reference.

Highway Engineers' Reference Book 1951
Circa: 1951
Some of BTH's lanterns and their uses were covered in this reference.