Mechanical calculators: FACIT C1-13
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I purchased this machine at an online auction site in February 2011. It was in quite good condition, apart from the natural deterioration of some rubber fixtures. Except for re-chrome plating the external levers, I kept its original look, including part of a sticker in the back from a maintenance shop in Belo Horizonte, Minas Gerais, Brazil.
Its mechanism, however, was hardened by the deterioration of oils and greases used in its lubrication from back in the 1960s and possibly the 1970s. I did a complete disassembly, cleaning and reassembly, along with a (modern) lubrication, and the machine is back in prime condition.
This machine was manufactured in about 1965 (ref), at FACIT's unit in Juiz de Fora, Minas Gerais, Brazil. Later machines had a plastic cover, but this one is in die-cast metal.
Have a mechanical calculator stored somewhere, and want to get rid of it? Send it to me!
Disassembly, cleaning and reassembly of a c.1965 FACIT C1-13 s/n B-82656
Disassembled parts
Base plate and keyboard
Right-hand side plate
Left-hand side plate
Division mechanims and carry lever detent bar
Accumulator and counter registers
Pinwheel rotor installed
Front view
Carry rotor
Masks and indicators
Finished
Rear view
Bottom view
More about this machine
The evolution of FACIT calculators
Video: how pinwheel calculators work
