https://www.maestronet.com/history/instruments.cfm?ID=3&first_name=Rene&middle_name=&last_name=Bernardel
Maestronet Instrument Price History for Rene Bernardel
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https://web-wp.archive.org/web/20161101015857/http:/www.sharmusic.com/Accessories/Rosin/Bernardel-Rosin-for-Violin-Viola-or-Cello.axd
Bernardel Rosin for Violin, Viola, or Cello | SHAR Music - sharmusic.com
Bernardel Light Rosin for Violin, Viola, Cello
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https://www.robertsonviolins.com/cello-archives/bernardel-leon-paris-1921-no-48
Bernardel Leon Paris 1921 No 48 | Robertson and Sons Violin Shop
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https://remix.net.ua/ua/catalog?obj%5Bcategory%5D=&obj%5Bbrand%5D=687
Bernardel
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https://shop.marshallmusic.com/p-811-connolly-gustave-bernardel-rosin.aspx
Marshall Music Online Store - Connolly Gustave Bernardel Rosin
Connolly Gustave Bernardel Rosin
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https://vernonviolins.co.uk/product/fine-french-violin-gand-bernardel-paris-1892/
A FINE FRENCH VIOLIN BY GAND & BERNARDEL PARIS 1892 - Vernon Violins Restoration