It is a Polka Norteña , a style heavily influenced by European musical traditions (German, Czech, and Polish) that integrated into Mexican culture in the 19th and 20th centuries.
" Cerro la Silla " refers to two major cultural icons of : the city’s most famous mountain landmark and the traditional northern Mexican polka that honors it. The Music: "El Cerro de la Silla" (Song)
It was famously composed by Antonio Tanguma , a legendary accordionist known as the "King of Polka" in Mexico.