Handgrenade?

[Nabob]

Hello, i am looking for ID of this item.
All I have are the pics, so I cannot say it is even real ammo.

Thank You, Bob.

 

[millsbomber]

the pin and ring looks real and old

 

[Eggburt1969]

The Explosive Ordnance Knowledge HUB (EOKHUB) posted this on its Twitter page yesterday (see link below).

https://twitter.com/eokhub/status/1254774055086899201

I looked through all my 'main' documents on grenades yesterday, but I couldn't find what it was.