Currency

|=AD&D Currency |
|1 copper coin|1 silver coin|1 electrum coin|1 gold coin|1 platinum coin|
|$1|$10|$50|$100|$1000|
|=GURPS Fantasy |
|Copper Farthing|Silver Penny|Gold Mark|Copper Pound|Silver Pound|Gold Pound|
|$1|$4|$80|$62.50|$1,000|$20,000|
|=GURPS DF + Electrum |
|Copper Farthing|Silver Penny|Electrum Wizbanger|Gold Mark|Copper Pound|Silver Pound|Gold Pound|
|$1|$4|$40|$80|$62.50|$1,000|$20,000|
|=My Tweaked Currency 1 |
|Copper Farthing|Silver Penny|Electrum Mark|Gold Crown|Silver Pound|Gold Pound (Dragon)|
|$1|$5|$50|$100|$1,000|$20,000|
|=My Tweaked Currency 2 |
|Copper Farthing|Silver Penny|Electrum Mark|Gold Crown|Platinum Dragon|Silver Pound|
|$1|$5|$50|$100|$500|$1000|
|=Tweak #3 |
|Copper Farthing|Silver Penny|Electrum Mark|Gold Crown|Platinum Drake|Silver Pound|Electrum Sphinx (Pound)|Gold Dragon (Pound)|
|$1|$5|$50|$100|$500|$1,000|$10,000|$20,000|
The Platinum Dragon of Tweak #2 might make more sense if the piece is actually just an alloy of gold and platinum -- more gold than platinum but the laced platinum provides added value.