Question: what is the difference between apple watch series 1 and 7000 series?
Answer: On series 1 and 2 it say on the back exactly like that: "series 1" or "series 2". 7000, it is the name of the aluminium alloy. 7000 series refers to the aluminium material used in certain Apple Watch models including 1st generation, Series 1 and Series 2 models.