Unknown rifle (?) grenade

[Yodamaster]

Hello everybody,
our EOD Divers team have found these two grenades in a "military" mere in Belgium.
We have no idea of the era of these grenades (pre WW1, WW2,...?).
The two grenades are different : one have three holes on the body, the other no.
You'll find the dimensions in mm on the pics.
The only markings we have found is : PARIS CP on the copper fuzing system. This system can let reminder on the Mills system (???).

Have somebody an idea ?
All docs, ideas or identification tips are welcome.

Yoda

 

[Francesco_Dif]

Very similar, but not the same, to the DBT 50mm grenade.

 

[Yodamaster]

I think it's the same era of construction. But very not sure.

Yoda

 

[Yodamaster]

Well,
nobody idea's !?

Yoda

 

[V40]

Yoda,

I am trying to find out what you have. Very interesting to say the least.

Mark

 

[Yodamaster]

Thanks to V40 for his looking on this difficult id !

Have somebody an idea ?

I just try a new bumping of this thread !

Yoda