Instruments played in the Tchaikovsky video:

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violin I

model A. Stradivari 1705

handmade in 2020

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one-piece back of european flamed maple,

italian spruce top.

violin II

model G.B. Guadagnini 1750

handmade in 2020

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one-piece back of european flamed maple,

italian spruce top.

viola

model A. Stradivari 1690

handmade in 2020

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two-pieces back of european flamed maple,

italian spruce top.