18 U.S. Code § 1343, which deals with mail fraud, wasn't created as a single, distinct statute at a specific point in time. It's the result of a long evolution of federal mail fraud statutes and has undergone numerous revisions and amendments over the years. The current version's wording is a product of various legislative changes since the original mail fraud statutes were enacted.
Therefore, there's no single "creation" date for 18 U.S.C. § 1343. Its roots go back to much earlier legislation, with significant changes happening over time.