Whoa!! Look at all the international ruckus these ringthings have caused!! Haha, too funny...
First of all, thank you all for taking the time (and energy!) to look into the matter!
I guess I should have piped in earlier

The rings in my photo are all flat, not bronze :P (just different sizes), and after listening to all this I know for sure they're not Celtic ring money...
I will also venture to doubt that they are parts of Dorset buttons...
So I'll leave it narrowed down to the spark plug dealies (boo!) or ring suspenders, which I prefer in my imagination (and some sites where they've turned up just don't support the idea of spark plugs being there... I'd like to think... sigh...)
Oh well. At least this all occasioned some breaking-up and making-up
I admire and appreciate you guys across the pond for your knowledge and history, and you too Kuger for the same reasons (and since we're nearby and on the same home forum). And, being that we're all not only oxygen breathing mammals with red blood, but that we also follow the very strange pursuit of metal bits in the ground with crazy electronic gadgets, I don't see that there should be any reason we shouldn't get along
That said, thanks again guys!
PS - I'm about to post another What Is It?, this time with a plant... Let's see what kind of fireworks we can get going with this one!

Jayson