The box names tend to change sometimes (hence the mislabeling - it's not intentional, mod promise), but unfortunately the Christmas and Valentine's ones are quite notorious for being confusing (the Gingerbread box was at one point called the Holiday Box, but we have multiple holiday boxes, and we've had a Valentine's Box and Valentine's Chest). This new one, for example, is called the VALENTINE chest rather than the VALENTINE'S chest -_-
I'll flag this over and see if it can be renamed to make it less confusing. In any case, to address your question about the prizes: this one is a ported box from Restaurant Story, so the possible prizes can be previewed on its respective Master Box listing. I imagine Anniras may make a separate thread for this as its introduction to Bakery Story and sale promotion period are separate from this larger sale (though it's also a Valentine's item, and the sale period overlaps... confusion on confusion!)
Master Box listing for the Valentine Chest (Restaurant Story)
--Note: only 8 prizes are ported over of the original 9 (not sure why), so one of the prizes will be missing. I've requested information to ask which prize is excluded in the Bakery version of this crate.
Prize previews: