Coin Terminology and Glossary

The Coin Collecting Dictionary includes 546 titles used widely in the coin collectors community, and has received over 1027476 search inquires.

Selected title: Castaing machine

Explanation: A device invented by French engineer Jean Castaing, which added the edge lettering and devices to early U.S. coins before they were struck. This machine was used until close collar dies were introduced which applied the edge device in the striking process

Most popular coin titles

Definition	Searches	Percentage
Specimen Proof (SP-70 or PF-70)	55172	13.63%
Silver Clad	32138	7.94%
Coin Silver	24218	5.98%
Slabbed Coins	23146	5.72%
BN	22722	5.61%
Encapsulated Coin	21749	5.37%
RB	21169	5.23%
Deep Cameo (DC or DCAM)	18197	4.49%
PF (PF60, PF70)	17930	4.43%
Reeded Edge	16973	4.19%
Ultra Cameo (UCAM)	16851	4.16%
PR (PR60, PR70)	15906	3.93%
Rarity	15845	3.91%
PQ	15737	3.89%
MS (MS60-MS70)	15495	3.83%
Incuse	14798	3.65%
Coin drop	14523	3.59%
High Relief	14419	3.56%
Reverse Cameo	14099	3.48%
Obverse or Face side	13826	3.41%