The Certina 19-26 watch movement is a manual wind movement with sweep second function. It features a date complication, which can be set by changing the 20-24 hour indicator. The movement is protected by Incabloc Shock Protection, ensuring its durability and reliability. The Certina 19-26 was used during the period around 1955. Further technical differences between the 64-2 and 641-2 variants are not currently known.