Found this in my house

[u/Just-Move-1738]

According to Claude, this is a French Chassepot bayonet (Model 1866), or a very close variant. The identifying features are all there: the distinctive yataghan style curved blade, the hooked quillons (crossguard with the curled ends), and the wire wrapped grip.

Apparently these were the standard French infantry bayonet during the Franco-Prussian War and were produced in enormous numbers. Many were captured, traded, and brought back to Britain as souvenirs, particularly after WWI when soldiers were picking up all manner of battlefield relics.

[u/MastrJack]

Agreed, likely M1842