Thank you for submitting your item for appraisal. This appears to be a complete set of six maps, compiled for the Generalstaben, 1:120 000 sand Störrelse over Slesvigs Fastland og Als efter Krigsministerens Befaling recognosceret i Aarene 1851 til 1854 af Officerer af Armeen paa Grundlag af Videnskabernes Selskabs Opmaalinger.
The map was in print from 1857-1870 and due to the military conflicts of this era was issued in large numbers. The estimate is based on similar items offered or sold at auction. There is no measurement for the sentimental value you might attach to it.