Estimated Date: 1910
Name: Jacquet Sphygmograph
Manufacturer: James Jacquet A/G
Description: 5 ×4 ×3 3/8” red leatherette box contains 4×3×2” sphygmograph in two parts. The wrist strap is separate and is a metal platform which attaches to the instrument and leather strap with three buckles, the instrument has a screw for adjusting the pressure on the arm, a box containing clockworks to run the paper and timer and needle for pulse recording. See a more complex example.
Reference 1: 415