Ear tester by Thackray, Leeds 1920


A rare ear sound tester by retailer Charles F. Thackray in Leeds, England. The instrument emits a rattling sound through a wind-up mechanism whereby a gear goes along a diaphragm and the rattling sound is amplified by a steel funnel. Dimensions 12.5 x 7 x 6 cm

SKU: 00 400731 a S Categories: ,

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