Johann Jakob Gretener (1850–1865 documented) Basel

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3rd quarter of 19th c.

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GRETENER / A BASEL (brand , upper joint) Boxwood; ivory (clamp) ; nickel silver (clamps , keys) six keys

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L. 320 mm, 268 mm (vibrating)

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Donation Carl Birrnann, Basel

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lnv. 1933.206.

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