Early spike bayonet ID?

Hi all, I have a spike bayonet. The blade is 20", overall it is 23". Any idea what this is? More pictures here.


Spike Bayonet pictures by hangman7 - Photobucket


Thanks

What are the dimensions of the socket? OD and ID. It looks European, it's missing the lock ring.


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Inside is .705". The outside is .885".

This appears to be a Netherlands M1871 for use with the Beaumont rifle.

Thanks for your help