What is the value of browning model acier special serial 12500 12 gauge with an engravings fabrique nationale herstal liege belgium browning's patents and oct91900-dec171901-sept301902-june161903?

Acier Special-C.12 Gauge Serial#384034 okg895 Fabric National D Armes Fabrique De-Guerre Herstal-Belgique what is this gun worthy