All enamel pins are made by hand and individually filled and polished by workers, therefore some of them can have imperfections. The more defects a pin may show, the cheaper it will be.
These pins are almost perfect and I say almost because they are handmade and there is no such thing as a perfect pin, but they are the best of the batch.
Small scratches or scuffs on the metal or enamel, barely noticeable.
Minor imperfections in metal plating, barely noticeable.
Slightly noticeable specks/dot or darkened specks in glitter areas on pins with glitter, this is expected variation in glitter pins.
Faint/light and small dot or small smudge on enamel, barely noticeable