Copper-alloy bow brooch

Bronze D-headed brooch, length 5.5cm. Small knobs at lower edges of headplate, larger at top; two concentric grooves enclosing rudimentary spiral decoration; short nearly flat bow; lozenge-shaped footplate with round lobe at base, surrounded by two grooves, and at top sides by rudimentary rendering of down-biting animal heads. On back single pierced lug with remains of iron spiral coil, and simple catchplate with remains of iron pin.