Apple watch SE 2nd Gen model number

Can someone clarify the below question? I am in Australia, I got a watch SE 44 starlight GPS from the Apple store, it has Model No MNLA3ZP/A on the box and invoice, but in all other vendors like JB HiFi, the Good Guys, Officeworks, they all have MODEL: MNJX3ZP/A, 

for the exact same watch. Why is there a difference? It doesn't seem making sense. Talk to Apple support and they can't answer this question either.