Wooden map plotting board or Kartenbrett named H. Merschwirth

A very nice original wooden map plotting board or Kartenbrett as used by officers in the field. These wooden boards where used by officers to observe maps without making them wet or dirty. These where vital in the field and scarce to find! It is named to H. Merschwirth and comes with the original inserts to clamp the map with. Very nice and scarce officer accessory, especially with the period contents!