Often referred to as the “sine wave” pattern, Pacific’s BH design features a series of dramatic loops. BH is a more common decorated pattern, found on all Hostessware colors. So far, I’ve only seen this pattern on plates and serving platters.
There are three backstamp variants: hand inscribed, stamped, and custom numbered. In the image gallery, you can see several examples of BH featuring custom pattern notations. It is unknown what the notations mean, but could refer to a custom batch number or particular decorator.