Edge of Coins

The side of the coin is called the "Edge" of the coin. Various kind of patterns and shapes are placed around the edge to prevent counterfeiting of coins by making it difficult to copy. Followings are the different kinds of edge which can be found in coin :

Plain Edge	No markings of any kind in the edges.
Grooved Edge	A groove is place halfway across and all around the edge. It looks like to coin glued together.
Reeded Edge	Fine serration all around the edge. Comes in various depth of serration and sometimes serrations are inclined though in most cases serrations are fine and vertical. It also known as milled edge or filed edge.
Security Edge	Grooved edge coin when have design, serrations or letterings in the groove called the security edge.
Inscribed Edge	plain or reeded edge having lettering all around its rim called inscribed edge.
Indented Edge	Plain or reeded edge with notch or indents placed with uniform spacing called indented edge.
Interrupted Reeded Edge	Edge having alternate sections of palin and reeded edge called interrupted reeded edge. The number and length of the sections varies coin to coin.
Serrated Edge	Serrations in reeded edge if looks like 'V' shaped and the very deep, then it called the serrated edge. Mostly can be seen in ancient coins where serrations and made by hand using chisel.
Polygon	These are rather shape varieties rather than edge varieties but I include it in the edge varieties because its the edge which is 10 sided or scalloped. Mostly comes with plain edge but sometimes reeded edge also can be found.