French M 1754 Infantry socket bayonet (ABCN704)(K611)(JN0),

French M 1754 Infantry rifle. Very nice triangular blade. Unreadable marking on the ricasso. Socket with a Z-shaped slot. No rim to the socket. MRD 22.5 mm. 
Socked is unit marked: 2. F. 6 . 
The bayonet is stained and shows areas of light pitting only. Not a relic bayonet.
An extremely rare early socket bayonet. very hard to find!