How many packs are in a crown Zenith ETB?

Excuse me, but I was wondering if you could clarify something for me regarding the crown Zenith ETB. Specifically, I'm interested in knowing how many packs are included in one of these boxes? It's important information for collectors like myself to have when considering a purchase. I've done some research, but I'd appreciate it if you could provide me with a definitive answer on the number of packs contained within a crown Zenith ETB. Thank you in advance for your help.