Yes its a meat tenderizer. All thought not all parts are there. Its missing the return leaf spring , which keeps the meat from sticking to the blades. I have seen them in alluminum , this one is steel and very heavy. No, I have not had it appraised. I'm not sure , but it may be from the 1800s. I'll try and find out more. The manufacturer is B&H and it has a patten # 6-14-21.