The Kildare harp has heavy iron plates at the neck-pillar joint, and also at the base of the soundbox and the projecting foot, and on the side and underside of the neck. These are held on with wood screws, which appear to be 19th century. The plate at the neck-pillar joint covers over painted decoration including a roundel.
It looks to me like the harp was falling to pieces at some point in the 19th century, and was fixed by these sturdy plates being applied.
There are also big cracks int he soundboard, repaired with metal straps.