The Model K 3 C was in production from 1950 to 1962 when the Model K-45 was introduced.
In 1955 Kitchenaid began producing the 3 C in colors and also in chrome finish and copper. The latter was shipped with a lacquer coating to preserve the finish but industrious homemakers used abrasive cleaners a bit too vigorously and many of these machines, including this one, have had mild to moderate damage to the finish, especially on areas where the material being processed might be deposited. I have seen three, besides this one, and all have evidence of damage to the finish.
Still, in spite of the less than perfect appearance of the finish, this is an attractive mixer and as it is fairly rare, should be interesting to serious collectors.
The following photos shows the area where there is most damage to the copper finish, virtually worn away, obviously from using abrasive cleaners.
Other areas on the body of the mixer exhibit fine scratches and some scuffing around areas of greatest exposure.