What is this?

[FlynnJP]

This was purchased by me at an estate sale. The prior owner was on a B-25 in WW2 and this came in a box with among other things training manuals on the Nordon bomb sights. Could this be a training aid of some sort? Thank you in advance. 

[Inertord]

Japanese Type 2 1/3 kg Cluster Bomb

[FlynnJP]

Finally got an answer after decades…. Thank you very much! I didn’t realize I had a real (disarmed) Japanese

cluster bomb sitting my desk all these years. 😳.