Nautilus Naval Beach, Gold Metal Club neckless 1926

[Rifleman]

I found a 1" diameter metal with a ring for a neckless attached to the top, gold in color that is inscribed Nautilus Navel Beach, Gold metal club 1926 on the back. It has building on the front and some type of shield on the back that looks like it says B C in it. I'm still in the process of cleaning it up as it has a lot of hardened corrosion on it. Anybody know anything about this. I tried to Google it, but came up with nothing. I will post pictures when I get it cleaned up better. There is other writing on the back that I cannot make out. It appears to be in very good condition. I found it while on a trip to Idaho. I'm assuming it's from Florida.

Thanks, John K