Need Help Identifying Manufacture and Pattern

The back of the plates have Germany and 79 imprinted on them.

 

You are not going to find anything based on the base stamp as it's a generic (export tax related) mark, meaning that it was not used by one specific factory alone. This type of mark was common between around 1905 and max. 1922. A very low product price was the reason for the use of this mark type instead of a fully fledged producer mark in the first place; such items can not be expected to be of high quality (as per German standards at the time).

Items with such a mark plus a specific producer mark *can* be found, those however are a completely different matter.