It differs from the one described previously only in its larger size and some details of construction.
Between the support in the shape of a truncated cone, which is 16 cm in height, and the base of the of the pump body there is a brass cube (4 cm face).
From the centre of two opposite side faces emerge the intake and compression pipes, marked respectively with the letters A and P; in the centre of the other two free faces there is the hand wheel of a tap that works on both the intake and compression pipes. The pump body is 28 cm in height and has an outside diameter of 3.8 cm.
The rectangular wooden base is painted black; it is 13 cm wide and 42.5 cm long. The piston is made of steel and is equipped with a wooden handle that makes it possible to work with both hands.
The overall height of the instrument is 65 cm.



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