Antique dining table and chairs with matching cabinet and sideboard

chair a table set, with butterfly leaf insert- purchased used in early 70’s .. neighbour had for many years before, so not sure of age. Chairs refinished in late 80’s . Matching sideboard and china cabinet from same era. Marking/stamped 635 on all the pieces ? No other markings or stamps that allows determination of age or manufacturer. Located in Vancouver bc . Is there any value ?