Antique Chinese jade seal / staff ornament netsuke

Description

I picked this up in China about 30 years ago, but I'm sure it's much older (can't give you a dynasty).  This appears to be a seal (rolled on wax to make a design) and may have been mounted on a rod or staff.
NOTES ON SHIPPING: The local post office trucks mail to a regional 'postal hub' for sorting, adding several days to the delivery process. Please allow at least 2 weeks for delivery.