I purchased these from an estate in Holland, MI, years ago.
The Holland Rusk Co. began in the late 1800s in Holland, MI. Rusk is a dry and crunchy round biscuit—basically twice-baked bread. It’s used in a lot of recipes and as a type of toast. In the Netherlands, rusk is used as a breakfast food, something like toast. It’s also used as a type of shortcake base.
These two advertising blotters were put out as a promotional item for the company. They were obviously never used based on their condition.
The blotters measure 8 1/4 x 3 3/4 inches and are made of a light cardboard.