Bring your vintage Singer Model 503A back to life with our curated collection of original used parts. From bobbins and presser feet to needles and tension springs, we have the authentic components you need to keep your machine sewing smoothly. Each part is carefully sourced to ensure a perfect fit for your 503A, a classic from Singer’s mid-century lineup. Shop with confidence from Venice, FL, and enjoy fast shipping on our 5000+ item inventory!