this is a quote i copied from the game link you supplied,
Galloping Golf is a dice driven game in which players compete at par 4 holes by rolling five dice with various outcomes. Each player scores between 2-9 per hole (no hole-in-one). Scores are tallied on scoring sheets and the lowest score wins.
A collectible feature of this game are the Bakelite/Catalin dice that are included. The game may have had several reincarnations, including being produced for Wilson Sporting Goods and for a company called Arl-Hi.
however, i wouldn't know the difference from bakelite / catalin.
i also found a couple of these for sale on ebay i think and the leather pouch was brown not black.
im wondering if that has any bearing on the timeframe when it was made.