For sale is my 6139-7070 from January 1976. Excellent case with the original finishing present. The dial and hands are immaculate and all-original. Service history is unknown but it is keeping good time (timed for a 24 hour period this week +3 seconds per day). The chronograph functions as it should and the sweep hand re-sets properly to 12:00, however the sub-dial minute counter hand is slightly misaligned. There is also scratch on crystal but I will include a Seiko NOS replacement in the sale. The date change functions as it should, but the crown a bit sticky when engaging the date change function. Original bracelet included and will fit up to 7.5” wrist comfortably with some room to spare. The leather strap seen in some of the photos is not included in the sale. Asking $525 USD shipped to Canada or CONUS (I’m located in Canada). For my European friends, we can discuss shipping costs. No returns. Plenty of references here as well as on r/watches and Watchuseek.