A 19th-Century brass SPHYGMOGRAPHE DE MAREY,
A 19th-Century brass SPHYGMOGRAPHE DE MAREY,

細節
A 19th-Century brass SPHYGMOGRAPHE DE MAREY,
stamped Breguet No. 52450, with pads and recording chart holder, spring-driven motor and rack drive, contained in the original purple plush-lined leatherette-covered case -- 8in. (21cm.) wide

See Colour Illustration