۰۸ اردیبهشت ۱۳۹۸ Harp admin Harp, Harps, museums instruments, scientific research, stringed instruments Harp ERARD, SÉBASTIEN ۱۸۲۵–۱۸۳۵ Description circa 1830, Grecian style, Original soundboard, 4049 is the harp serial number not the patent number