thomas and friends mini series

Ok, this is probably a silly, novice type question, but is there easy way to tell apart the 2015 wave 1&2 from the 2016 wave 1&2 blind bags? I mean do they have contigous numbers or did they reset them? If so is there any other way to tell if the bag is a 2016 one?

I'm asking as I've never seen any over 58 or whatever 2015 wave 2 finished at but seen plenty in the shops with lower numbers if that makes sense...