Hi, in Greece we are used in shaking, we drink our coffe this way! ("frappe"!)..
Anyway,luckily i am still here writting and i promise not to shake anymore, and if i ever shake again, at least i will have a photographer near by to send you the results guys....
About the age nobody knows, but i would guess is propably early to mid-19th century, when Crete was constantly on uprising against the Turkish domination.
So this should be actually a revolutionaries home-made grenade.
In contrary, (and regarding Michael's question) the iron grenade could no be identified as Greek, since it needed a more organised manufacturing facility, which Greeks didnt had. Also, if we asume that it dates from Venetian times, all iron workers were on strict regulations from the Venetian authorities and they even had to be working inside the cities in order to be better controlled.