“plain bone”  (England)

England. Next plain bone sets are often incorrectly called "Barleycorn" sets. And I used to call them "plain Barleycorn". Now I have concluded that it is better to indicate them as "plain bone" or maybe "ribbed bone" sets, although the latter is not for all sets applicable, like the last one in this series.

Note that the overall shape is like "Barleycorn" sets: big barrels, big rooks with finial and often a flag, round knights and bishops with a deep slit. These sets are very common, except that the last set of the four has a less common pattern. In black they are very uncommon, but the black set here has been painted later on and was originally red.