The serrations work like a mini grater. Scrape a piece of ginger with the edge — you get pulp, not stringy fibers.
5. Soft-boiled eggs
In the UK it is sold as an "egg spoon." The point cracks the top, the teeth help lift the shell.
6. Canned fruit and tomatoes
The point spears a peach half, the serrations cut it in the can.
Why yours looks "weird"
The photo you posted is slightly bent at the tip — common after 40 years in a dishwasher. The black spot near the point is likely a tiny pit from acidic citrus, not rust (stainless steel can pit). It is still safe.
If the serrations feel dull, you can sharpen them in 10 seconds: fold a piece of aluminum foil 4 times and saw through it 5-6 times. The foil hones the micro-teeth.
Grapefruit spoon vs. grapefruit knife vs. regular spoon
Tool
Best for
Mess
Regular teaspoon
Yogurt, cereal