Unitrade BK70 w/ Counting Tab and w/ spots or dots in between position 4/2 & 5/2
The counting tab booklet alone catalogues at $18.75 (2.5 times premium per Unitrade)
Robin Harris, in his Centennial Definitive Series 1967-1973 book, pg. 342, suggests a premium of 5X cat value for the dot variety.
