Here is a shot of three knotting shuttles. These are quite large. The two mother of pearl shuttles are dated to about the late 1700's to early 1800's.
The shuttle in the middle was made in 1700's in Canton China for a ladies work box. These shuttles are notorious for not having much room for thread. Some say this was because they didn't actual know the purpose of the shuttle but rather focused on the intricate carving.