These are some great-looking coins. Along with the 1915 S half dollar (click here to see it), four gold coins were minted at the San Francisco Mint to commemorate the Panama-Pacific International Exposition held in San Francisco in 1915.
These coins all have a base value relative to their gold content. The current base value can be determined by multiplying the AGW (actual gold weight, posted below) by the current spot price of gold. Current prices can be found on kitco.com. On top of the base value, each coin carries a premium both for their historical nature as well as their appeal to collectors.
The $1 coin shows a canal worker. This image is often (and easily) mistaken for a baseball player. The reverse of this coin shows two dolphins surrounding the denomination. This coin has an AGW of .048 ounces. Catalog values for this coin are as follows:
worn: $300 US dollars approximate catalog value
average circulated: $425
well preserved: $500
fully uncirculated: $600
Please note that these are catalog values, which can be different from actual buy and sell values. For more information on catalog values, please check out our Terminology page.
As always in coin collecting, condition is everything. I have seen super-dazzler examples of this coin selling for $8000, and sad-clunkers selling for $175.
As best we can tell, there are no counterfeits of this coin -- or at least not many counterfeits.