military launches has identified
 

It measures 70 cm long, it has four sections

thank

A very nice pike? Or lance. Can we see the other end of the pole? How long is the shaft? The four-sided point pattern usually indicates the late 18th/early 19th century. This dating also supported by the type of securing screw through the shaft. If the shaft is short, perhaps a boarding pike (military pikes long gone by this time), if a longer pole would indicate a lance, which were still used up to the end of the 19th c. :shrug:
Mark

Hmmm...the more I look at it, I think the point is too long to be a pike. Lance would be a better fit. Depending in the other end of the shaft (butt cap? Blunt flat wood? Rounded wood butt?), it could be Spanish, British Lancers??

PIKE
 

the handle measuring 1 m 40, but I don't know if it is the original?

It would appear to be intended almost wholly as armour piercing, mail or plate, a bodkin point, except perhaps taken to the extreme in this instance. I would suggest that it predates the 18th century.
Adrian