basal value The value base from which Dr. William H. Sheldon's 70-point grade/price system started; this lowest-grade price was one dollar for the 1794 large cent upon which he based his system.
This scale, which ranged from 1 to 70, was originally devised to ascertain values of 1793-1814 Large Cents by ascribing a basal value to each variety and multiplying this value by the grade in order to determine a price.
 See also: Liberty, Point, Gold, Half, Eagle
  
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