You probably already own 2-4. Check:
The back of your cutlery drawer (often mixed with iced tea spoons)
Thrift stores — sold as "citrus spoons" for $0.25
Restaurant supply stores — a dozen for $12
Modern versions come in matte black, gold, and with a longer handle for tall parfait glasses. The design has not changed in 100 years because it does not need to.
Bottom line
That pointy, saw-toothed spoon is not a mistake from the factory. It is a single-purpose tool that turned out to be perfect for half the fruit in your kitchen.
Next time you cut a kiwi, mango, or even a soft avocado, skip the knife and grab the weird spoon. Scoop, saw, lift. You will understand why hotels ordered them by the thousand — and why your grandmother never threw hers away.