Id Bronze friend? of the thinker

I've had this one for more than 1 year now, it comes from my grandmother's inheritance.
it is about 12 cm long and wide and weighs more than 1.7 kg therefore I think it is made of bronze.
statue looks like a not finished study object but perhaps I'm wrong

I would like some more information to determine whether to keep it or sell it. I would appreciate if you can give any information about the subject, the possible maker, the period when it created and possible appropriate sell price

 

It looks like a student piece. Did your grandmother know anyone who could have made it?

 

unfortunately we don't know if the grannie knew anyone who made these.