The Grenade Recognition Manual
Grenade Data Sheet
Designation-  Gr Ma Df 37/46 Country of Origin-  France
Type- Fragmentation Years or Era-  1937 -
Weight  540 gm
Diameter  55 mm
Length- Total  95 mm
Length- Body  
Fuze Designation  BAT 5 s 35
Fuze Type  Percussion
Fuze Delay  4-7 sec.
Filling Type  Tolite
Filling Weight  60 gm
Detonator  
Body Material  Cast iron
Effective Radius  10 metres

Manufacturer-   Markings-  Vary depending on era.
Notes- Originally known as "Little Brown Jug".