Not quite coins.
Jettons are reckoning counters; trade tokens are unofficial small change. Both imitate coin designs but carry different legends, and neither is a “fake coin” — each served a real purpose.
Nuremberg jettons flooded Europe from the fifteenth to seventeenth centuries — the “rose and orb” type and ship pennies are everywhere, and the makers’ names (Krauwinckel, Schultes) date them closely.
Seventeenth-century trade tokens name a real tradesman and town, often with a trade sign — a farthing’s worth of local history. Eighteenth-century Conder tokens turn political and pictorial and are collected in their own right.
Read the legend and device rather than assuming a coin. Record issuer, town, and date where given; an identified token is often more informative than a worn coin of the same size.
Identifying Roman silver coins