I'm all for chilling, and I do apologize if my comments annoyed people. My vote is post-contact but old, not that it matters.
A technical point about manufacturing the circles: if it's made by stone friction (and I'm including the sand and equisetum trick), you're almost certainly going to see a round bottom on the circle grooves, and I suspect it will be uneven. Get a good, bright light and a good magnifying glass, and examine the bottoms of the grooves.
If it's cut by steel or iron, the lines tend to be much sharper, because sharp metal cuts much more cleanly. If you see squared, even bottoms on the circles, they're almost certainly cut by metal.
Also, take a good ruler (micrometer if you have one) to the circles and measure their diameters. If they're all the same size (say within <1 mm) that argues again for a metal tool such as a drill bit. The reason is that something like an equisetum stem will wear down, and they'll probably have to use a bunch of stems. This will lead to different-sized circles.
Obviously, if someone scribed this with a divider, it will be harder to see, because the lines will be worked with dull steel and a variable diameter tool. However, steel generally cuts more cleanly than stone or bone tools, so clean cuts are evidence of steel tools.
Finally, for typing, DNA, and carbon-dating: you can take it to a natural history museum, and probably get a guess as to which whale it came from (along the lines of sperm whale, one of the roquals, or a dolphin). They'll do that by comparing bone specimens. It probably came from either a rib or lower jaw. As others noted, DNA genotyping would be difficult, because there's human DNA and who knows what else on the surface. They would have to drill deep inside the club to get the sample. Ditto with carbon dating, because there's modern carbon all over the surface. Only you can answer whether it's worth those tests.
Best,
F
|