here are 2 bobbins by Tom in my collection.
Notice his "signature" - the round ball on the top end of the bobbins.

He has been using this "signature" for 13 years
so you can see if you have a "real" Tom Clark bobbin!

Tom lives in New Jersey and he can be reached at trclark@optonline.net
 He guarantees his bobbins, if you break them he fixes them for free!