BTCPianoTuner on Nostr: here it is here it is https://www.patrimonionacional.es/colecciones-reales/instrumentos-musicales/pianoforte-juan-del-marmol?fbclid=IwAR0zUH2s2INoZuj7iKrAvYfm1vKm9cIZLbulu8Dp60lVW0kjz49YzOiEjhc_aem_AQHaGxPHHgi-6e-KPriYgw5R5M7aTfUHcF-hpQWBSBeQ-WKBOp0rhAqrCkBcBCoBBSs
