I know of two types:

1. Lucky cats of the Wishing Cat brand usually have a trademark pattern on the back of their buttocks, but mobile phone chains and magic weapons generally do not.

2. There is usually a box at the bottom of Doletang's Lucky Cat, with the words "Cat House Doletang Main Shop" written inside, the kitten (roly-poly, mobile phone chain, pendant) and the pharmacist kiln (Limited products from Dao Letang) are generally not available.

Of course it also depends on the craftsmanship.

If you want to see the details, you have to go to my store (Nakashima, 1st floor, SM Plaza, Second Ring Road, Chengdu)