Hi,

William Cashmore manufactured double shotguns in Birmingham, England in the late 1800's and early 1900's. Most have full coverage engraving on the receivers which are blued, case colored or nickel plated. Stocks are French or English walnut. Both sidelock and boxlock style receivers were used with double triggers, extractors or ejectors and a top lever to open the barrels. They were produced in 12, 16, and 20 gauge.

There are no listings in the Blue Book, Standard Catalog of Firearms or any other books that I can find. There are some that were sold at auction and in British gun shops recently. The prices have been from $3000 at Rock Island to approximately $9000 at The Doublegun Shop. I think this listing is too high. There is a beautiful Boxlock that was on Guns America for $5095 and another at Cabelas for $4600. Both have fantastic wood.

http://www.gunsamerica.com/933167274/Guns/Shotguns/Double-Shotguns/English/William_Cashmore_Pigeon_Gun_FABULOUS_LONG_RANGE_GUN.htm#

http://www.cabelas.com/english-shotguns-william-cashmore-ble-s-s-in-12-gauge-1.shtml

A 12 gauge listed on Guns International listed at $4950.

http://www.gunsinternational.com/WIlliam-Cashmore-Best-Boxlock-12-Gauge.cfm?gun_id=100246416

You can compare your gun to these listings. It looks like the average price is about $4800 for a gun in good to very good condition.

I hope this helps you,

Tom