BIG ORIENTAL JAR

[JB8656]

Hello,
Just bought this old Oriental Ceramic Jar here in Ireland.
It does look very old...but hope not it is a copy....
The dim are: 75CM High 66cm diameter at center and 30 cm hole diameter.
Something strange ,it is I am sure ceramic but it sound like there is metal inside...????
Can you help???
Thanking you in advance
JB