Invisible Joint Watch Case Co.

Case Grades

Note: This chart is not intended to be a comprehensive list of grades. Some grades changed traits over time and other grades may not be listed. This chart will be improved as additional information is studied.

Image	Name	Case Material	Gold Content	Gurantee	Source Catalogs	Trademarked
	Invisible Joint Coin Silver	Coin Silver			1885OY, 1886HMS, 1888OY