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_1307572_1 (first_minting VARCHAR, mass VARCHAR)
### Question:
When was the coin with the mass of 3.7 g first minted?
### Answer:
SELECT first_minting FROM table_1307572_1 WHERE mass = "3.7 g"