I have a Hollenbeck 12 ga. x 12 ga. x 30-30. #767, patent date of 2/13/1900. Damascus steel barrels, fully engraved (bear & mountains on one side, deer on other side), bird flying over water on trigger guard. Butt plate has Hollenbeck Gun Co. and Wheeling, WV on it. 28" barrel, flip-up,stairstep rear sight, trigger is double with front trigger as rifle trigger. Checkered pistol grip stock with decorative pistol grip cap, fore end is checkered with engraved hardware. Rifle cocking lever in front of trigger guard. Wood has no major mars or scuffs. Bore condition is excellent. I have some information on Hollenbeck and the Three Barrel Gun Co. but am trying to find a value on it. Any information you can give me would be greatly appreciated.