Copper-alloy shoe buckle and plate

Small buckle, probably a shoe-buckle, loop cast in one with plate, length 2.5cm. Oval loop, with little groups of transverse grooves on either side of pin rest; plate rounded triangular with rivet holes in upper corners and in flat lobe on foot. Remains of pin: tip resting on loop, hook attachment still in place in pin hole at top centre of plate.