By A Mystery Man Writer
You are considering a vintage British No4 Mk III Spike Bayonet. It's the 4th iteration of the bayonet and the socket was made of stamped steel pieces.
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Lee Enfield No. 4 Mk III bayonet
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WWII Enfield No. 4 Mk. II Spike Bayonet : Singer Mfg. Co. – Everything Old Antiques & Vintage
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WWII British Lee Enfield No.4 Mk. III spike bayonet with Bakelite scabbard - Militaria