Today has been a KVK1 day for me because I have acquired two KVK1 in boxes with swords and without them. The silvering of both crosses is in good state.
KVK1 with swords is marked by "1". The box seems native marked by "Deschler & Sohn".
KVK2 is marked "15" but I have no idea about an origin of the box. Maybe it is native as well.