Numismatic definitions
Like most fields of expertise, numismatics has its own lingo. Find the numismatic definition of a term by entering it in the field below.
Working hub
The reduction punch is placed in an hydraulic press. In a process known as hobbing, the design is transferred onto a softened steel block, using 100 to 400 tonnes of pressure. The result is a master die, containing a negative impression of the coin design. The master die is hardened, and is then used to hob another steel block. The result is a working hub, containing a positive impression of the design.
