Collectable jars?
Not as odd as it sounds lol I have a chinese/japanese tea caddy and a sugar caddy that looks like a jamaican person they are pretty old and I wondered if anyone would know where to find information about them as I have scoured the places that are obvious but to no avail they are made in england by PEK I think.
Look up antique dealers in the phone book and contact them. Some are very helpful and will tell you how to find out the information you seek.