Beautifully engraved certificate from the Wenzel Pneumatic Clock Company of the District of Columbia issued
in 1882. This historic document has an
ornate border around it with a vignette of the U.S. Capitol. This item is hand signed by the Company's President and Secretary and is
over 122 years old.
Pneumatic Clocks were had a master clock system. The pendulum-driven master clock system needed no electrical current to control the remote (slave) clocks which indexed every minute on a 'puff' of air.
The master clock ran like a typical grandfather clock using weighted pulleys and a pendulum. The clock also has a small bellows inside. When the bellows push down, air is pumped through a closed system of tubes connected to the secondary or "slave" clocks, moving the hands on those clocks. These types of clocks were very accurate when operating properly.
Pneumatic clocks were used in offices or government buildings where multiple clocks were located.
We will always maintain our founding commitment to customer satisfaction and the delivery of an educational product with an enjoyable shopping experience. Please
let us know how we may be of service to you.
All Old Stock and Bond
Certificates are actual authentic certificates and are sold only as collectibles.
We do not sell reproductions and offer a lifetime guarantee to the
authenticity of everything we sell.