LINZ JEWELERS DALLAS EXCLUSIVE ROSENTHAL GERMANY 100 YR ANNIVERSARY LOGO COASTER

The item is a Rosenthal Germany cobalt blue and white porcelain coaster, created exclusively for Linz Jewelers in Dallas, Texas, to commemorate their 100th anniversary (1877-1977).
It is 4 1/8" in diameter and 3/4" tall.
The coaster is marked with "1877 to 1977" and "Linz Jewelists" on the front.
The coaster is described as being in good condition, there are imperfections from being vintage and/or when manufactured that it takes zooming the photo to see.
PreOwned estate find.
Pictures are part of the description.