I just acquired a vintage Clark harp, I was looking the Clark harps up online and found this discussion. My Clark harp serial number is 2660. The blade levers were replaced. That explains the missing levers on all E and A strings. They might be the Loveland levers. The harp has a very bright sound with the Savarez Harp strings, I’m wondering what type of strings it had originally. With a harp this old it is probably important to have the lightest gauge strings? I just ordered
Linda Pembroke Kaiser’s book Pulling Strings I am looking forward to reading about the Harps.