Gimel Coin

Gimel Coins are old coins which are said to bring whoever possesses them luck. In the game series, Gimel Coins allow the users to save anywhere (by expending one) or to restart a battle in which they had lost. The coins were used in up until Wild Arms 4, from which point they were replaced by Break Points.

Wild Arms
In Wild Arms: Alter Code, it's expressly stated that the coins were the primary currency of the Elw. In fact, those refugees in the Elw Dimension still use Gimel Coins as their currency.