Bluthner style VII 190cm grand piano c1889 + regulating the Patent action spring

[@TheOnlooker65]

As always fascinating, thank you

[@lawrencejuanlin9113]

Hi Robert, is it true that Renner hammers are harder and create a brighter sound than Abel hammers?
Best greetings from Vienna 🎉🎉

[@cliveparaschis]

Beautiful piano

[@saveriosalerno9232]

Great it!!