Many old catalogs contain pictures of open salts that will help identify a maker and time of manufacture. Most images enlarge, so click on the image to enlarge.

USA Catalogs
Austria Catalogs	Belgium Catalogs
Bulgaria Catalogs	Czechoslovakia Catalogs
Denmark Catalogs	England Catalogs
Finland Catalogs	France Catalogs
Germany Catalogs	Ireland Catalogs
Netherlands Catalogs	Norway Catalogs
Poland Catalogs	Spain Catalogs
Sweden Catalogs	Switzerland Catalogs