I could be wrong but I think Greg (not personally) puts the sticker on. Different companies use different manufacturers to can the product. More than likely there's an extra charge for dating, or if they do mark them it’s for internal purposes. When tins arrive in sleeves they would need to be cut open and then labeled. That would increase labor charges, even to the point of shipping. When a shipment of 1000+ tins comes in, they want to run the bar code reader and stack the box on a shelf. Sounds minor but when you work on a small mark up, every dollar counts.