An early 20th-Century English nickel-plated wrist syphgmograph
An early 20th-Century English nickel-plated wrist syphgmograph, engraved Down Bro s 3 S t Thomas's S t LONDON N o 2096 , in the original manufacturers case -- 7.6 x 4.6 x 6.8cm. (3 x 1¾ x 2¾in.)
An early 20th-Century English nickel-plated wrist syphgmograph
An early 20th-Century English nickel-plated wrist syphgmograph, engraved Down Bro s 3 S t Thomas's S t LONDON N o 2096 , in the original manufacturers case -- 7.6 x 4.6 x 6.8cm. (3 x 1¾ x 2¾in.)
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
