1, black mark: it is the fighting leg in ham, the highest grade, 100% Iberian variety, free-range in the mountains, feeding on acorns.
2, red logo: both are edible acorns, which are free-range in the mountains. The difference is that the pig breed is not as good as the black label, with 50% or 75% Iberian descent.
3. Green sign: captive, with Iberian descent, relatively open living environment, mainly feeding feed.
4, white sign: captive, Iberian descent, living environment is relatively cramped, food is feed.
Selection method:
Jamón is made of pig hind legs. If it's ham made of pig's forelegs, it's called Paleta. After ham products are produced, the words Jamón (hind leg) and Paleta (front leg) will be printed on the packaging for consumers to distinguish. Because the pork in the pig's front legs is relatively less, the meat quality is harder, and the pork in the pig's back legs is more fat, the ham made is better.
Reference: Baidu Encyclopedia-Spanish Ham