Pair of Continental bow brooches

Pair of silver-gilt ?Frankish bow brooches, l. 8.2cm. Rect. headplate with fused flattened knobs, slightly hollow at back, 3 at top, 2 at sides, with double ridge between them and ungilded band with 2 rows nielloed triangles; similar bands border edges of bow and oval foot, and go down centre of bow. Chip-carved, interlocking angular ornament on head, bow and foot. At lower end of foot an animal head full face in relief (hollow behind). Plain silver band with single row of nielloed triangles for brows, nose and base of muzzle - 2 grooves above brows, under round eyes, and 3 on either side of muzzle. Behind pair of attachments for missing spring-coil of pin, simple catchplate. Both cracked under bow, and repaired with modern solder.