Database: card_games (difficulty: simple)
Question: For Artifact Creature — Assembly-Worker type of cards that do not have multiple faces on the same card, state its legalities status for vintage play format.
SQL: SELECT DISTINCT T2.status FROM cards AS T1 INNER JOIN legalities AS T2 ON T1.uuid = T2.uuid WHERE T1.type = 'Artifact Creature — Assembly-Worker' AND T2.format = 'vintage' AND T1.side IS NULL