This high-quality replacement bobbin case with open front, part # 105032 is designed to be used with hook part # 276254. Please note that it is not compatible with hook part # 173061.
Works with Singer model: 206, 206K, 206W, 306, 306W, 319, 319K USING hook part # 276254.
When replacing the bobbin case in these models, it is essential to know the hook's part number.