Pic KIT 45
Model FERTIG made by Ph.
Patent 228054. August 28, 1909. The special of the FERTIG is the
indicator, which is built like an extra pendulum, and act like a
self-adjusting mechanism. Placed on a slope the chart will rotate to a new
resting position, but this type of indicator simply follows the chart to
this new zero position. A separate leveling zero adjusting screw is not
necessary with this design of letter scale.
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