If your early postcard says it was printed in Germany, it is from before 1915. Colored borders, partial borders and scalloped edges can be found.
The photochrome postcard should not be confused with Real Photo Postcards.
If the postcard is used, the most check the date on the postmark.
In 2007 in Kentucky Representative JR Gray sponsored legislation in the state legislature that passed making it a felony for a teacher to have sex with a student under the age of 18.
He also discussed the possibility of raising the age of consent from 16 to 18 but a bill was not produced for that. Prior to 1981 Wisconsin had an exception to the law that allowed adults who were guilty of sex with minors 15 or older to use as a defense that the victim understood the nature of the sexual act, but there was a rebuttable presumption in Wisconsin that minors under the age of 18 were not capable of informed consent to sex, but as stated, this could be argued against by the defendant in the court of law if the minor was 15 years of age or older.
Two final states legislating their ages of consent into the 15–18 range were Georgia and Hawaii, from 14, raised in 19, respectively. Georgia was the most notoriously resistant state to raising its age of consent in the early 1900s.
In Alabama in 2012 State Representative Mac Mc Cutcheon sponsored a bill to raise the age of consent from 16 to 18 in the state legislature. Georgia's age of consent was 10 until 1918, and even then the age of consent was only raised to 14.
Cards previous to that had to have the Private Mailing Card Statement. There was often a statement that said "this side for address only." The postal service started allowing the use of divided back postcards in March of 1907.