Warranty: Your Ritter Stopwatch is guaranteed against manufacturer defects for one year from purchase. Mechanical Stopwatch Repair: Should you require repair under warranty or for any other reason simply contact us for instructions to send your stopwatch in for repair. Call (602)-997-7299 or send an email to carinaritter@aol.com for shipment instructions and our reasonable rates. WE ALSO REPAIR ALL MODELS OF MECHANICAL STOPWATCHES.