This watch is a non-export JDM 6139 chronograph from December 1970. It came with a JDM 21 jewel speedtimer movement which has been upgraded with 2 jewels making it a total of 23 jewels. This includes the arbor jewel, top and bottom. It is original lume and unfaded original dial printing. It has the original correct two piece early sweep. The sweep and subregister were both faded and I retinted them to red/orange. Case has good original polish. There are some tool marks on caseback and one scratch on the case next to bezel at the 40 min mark. The rest of case is excellent. Chapter ring is beautiful, watch is fully serviced and ready to wear. Head only.