Grading Ancient Coins (A comparison by type)
By: Alfredo De La Fe
Grading has become incredibly subjective but if standards are met technical grading should not differ much from one grader to the next. This article is the first in a series and discusses technical grading.

Colin Kraay's Explanation of the Phenomenon of Overstruck Reverses on Roman Imperial and Provincial Coins
By: Curtis Clay
Roman coins of the first to mid third century quite often show a peculiar striking error: their obverses are normal, but their reverses are overstruck, either with two different dies of the same type, or with two different types that were however apparently in use simultaneously. The apparent explanation of this phenomenon occurred to Colin Kraay during a conversation with Curtis Clay in the early 1970s.