Now that's a set of keys!
Is that mother of pearl?
It gives me harpsichord vibes
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I would guess ebony with gold and silver filigree
this is mother of pearl with rosewood
here it is https://www.patrimonionacional.es/colecciones-reales/instrumentos-musicales/pianoforte-juan-del-marmol?fbclid=IwAR0zUH2s2INoZuj7iKrAvYfm1vKm9cIZLbulu8Dp60lVW0kjz49YzOiEjhc_aem_AQHaGxPHHgi-6e-KPriYgw5R5M7aTfUHcF-hpQWBSBeQ-WKBOp0rhAqrCkBcBCoBBSs