I normally don't see meters go bad but the PO broke one of the Taut Band Movements (other models used in 700B's use the pivot jewel's but the Jewell Model 75's are Taut Band and would use their respective cases to secure the movements)
Taut band suspension systems are characterized by the suspension of the armature assembly on two extremely fine metal bands which are held in tension by resilient anchors supported on an instrument frame.