Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_15635768_1 (date_of_issue VARCHAR, face_value VARCHAR)
### Question:
When the face value is 42¢, what was the issue's date?
### Answer:
SELECT date_of_issue FROM table_15635768_1 WHERE face_value = "42¢"