The main body is stamped with the makers mark of "J. HUDSON & CO" over "BIRMINGHAM" over the date of "1916". The cap is also marked with "PATENT 5727-08".
Spanish Peaks from Nunda's Colorado Original Metropolitan Series Stereoview
Whistle Chain WW1 & WW2 Original Acme Made Nickel Thunderer Metropolitan NEW
WW1 & WW2 Whistle Box for 'Metropolitan' type Infantry or Air Force Whistle ACME
Infantry Officers Whistle - WW1 Trench Soldier British W↑D No.15 Metropolitan
WW2 British Whistle Army 1939-1945 Metropolitan J Hudson RAF ACME WWII Brass New
No. 15 Metropolitan Infantry Officers Whistle-Dated 1916 - Reproduction
