In the Swedish digital museum I came across this odd projectile.
Described as an incendiary projectile for rifles. No caliber given but as per the scale it is something around 17mm.
Not much info there as usual but what they said was:
1823 (date of invention/production/testing)
The name “Sandberg” is given as the inventor.
Basically this appears to be what is written on the side of the cardboard hull (containing the incendiary I assume).
Does anybody know more about?