If the gun was made after 1894 (if I remember correctly) then you can believe the "Belgium Damascus". Provided it really was produced in Belgium. Though "Belgium Damascus" bothers me.
Not all guns were finished black & white. Some were finished black, other brown or brown & white. Some were simply etched with hydrochloric acid.
Jim is correct, look under the forearm. I would use some steel wool to remove the finish ( or paint ). If it is damascus you should be able to discern some pattern in the bear metal.
Pete
