37mm with odd round top, for which fuze??

[303hans]

I have two 37 mm grenades with a odd round top. The two grenades are French but the are slightly different. The dri8ving band are not on the same hight and the knurdelring is different. Both have no markings. And a flat bottom.
The top of the grenade has round edges.
I bougt the two together placed on 37-1902 cases. The cases were taken out of the production proces because both were not finished. (To long neck and no primer pochet drilled in) So the grenades would not belong to the cases
Can any one tell me:
What type of grenade it is (maybe a very normal one)
What kind of fuze for this grenade
Regards Hans

 

[Gspragge]

I'm stumped, the different spacing is unusual. These have the look of being polished as the finish
is much smoother than any I have seen except a 1937 example. Possible rejects taken home as souvenirs ???
Or something for trial use ?
This sort of thing is very difficult to get worked out. A flat bottom generally means pre 1915 or post 1918
except for specialty types. I cannot think of a need for a rounded top unless these are not meant to be fuzed and fired and have some kind of gauging purpose?
and something else was screwed into them. There have been purported examples which were used to check chamber wear in some fashion, but I have not heard of anything official. That these have two different band positions makes this idea difficult I think.

 

[bdgreen]

Production line rejects? Unfinished production line projectiles? Unfinished trench art?

 

[303hans]

both grenades are very smooth, from bottom to top. Maybe Trench Art or...............