Peugeot 1914 2¾ h.p. V-Twin
The unique silencer which is a standard fitting of the 2 ¾ h.p. Peugeot. When the machine is in motion there is a continuous draught of air passing through, and drawing out the gases.
Source:
The Motor Cycle, July 30th, 1914. p152
Peugeot 1914 2¾ hp Twin