huge old potato masher or crock tamper, primitive vintage kitchen tool w/ long wood handle

Really BIG vintage masher or tamper, about 18" long end to end and 5" x 4 1/2" over the masher. This is strong and heavy, two or three times the size of a regular potato masher. Industrial grade, maybe for a commercial kitchen, bakery or restaurant? Probably early to mid 20th century, I think.