Salvation Army workers in Tulsa, Oklahoma, got a nice surprise this week when they found a handful of rare coins in a donation kettle.

One copper coin and seven gold coins were found during the money-counting process this week. The coins range from rare American currency to South African Gold Proof coins.

They were appraised at Tulsa Gold and Silver and valued at nearly $6,800.

No one knows who is responsible for the generous donation.

Despite the welcome boost from the coins, officials said Salvation Army donation totals are down significantly this year. They believe online shopping may be partially responsible.

The Salvation Army will continue to collect money through their red kettle campaign through Christmas.