It has the word “Patent” but no patent number. I think it is made from nickel plated brass and has the original brass chain with hook.
The Metropolitan City of London Police Reserve Whistle w/ Chain 1911-1919 WW1
Lot of Photos, Letters, Ephemera + autographs concerning the Metropolitan Opera
Vincent Perez Signed & Mounted Page - Queen Of The Damned, Crow City Of Angels
Festival of the City of London 1982 Programme Cecile Ousset Piano Recital
Festival of the City of London 1978 Programme Classical Music Concert Guide
Festival of the CITY OF LONDON 1962 Original Programme Book
