The inscriptions appear to be as American as mom's apple pie
In period German, don't be surprised to find months represented by roman numerals as well. Dots are usually used to separate the elements within the date: like 4.4.14 or 4.IV.14. Usually the '19' is left out of the year.
Most pre-1945 German writing is a bit difficult to read anyway. They experimented with different script styles that still give everyone who's trying to read it a headache today. So if you can read it, it's probably not German in origin