This is a complete and original Seiko 6306-7001, made in July 1979 (97xxxx serial). This is the JDM version of the famous so-called “turtle” 6309-704x. The 6306 had four added jewels (two diafix settings in the train bridge) and hacking. The daywheel languages are Kanji & English.

I fully serviced this watch three weeks ago - it got everything including both upper AND lower mainspring arbor jewels, so this watch is a 23-jewel now. Six-month warranty from date of purchase.

• Movement serviced and is accurate & strong. Clean amplitude in the 260s with zero beat error, flat accuracy.

• Upper & lower mainspring arbor jewels are installed

• New 613x chronograph mainspring (stiffer, higher amplitude)

• Hacks as it should

• Date and day quickset works as it should.

• Original dial in excellent condition

• Dial lume is original, in the light butter tan, and is unusual in that when the lume plots were printed (these are screen-printed) the printing machine had a slight overload of lume mix. As a result, the lume plots are slightly blobby to the sides, not quite even. This is most noticeable on the 12-marker on the right side. The lume is in perfect functional condition. It isn’t damaged or degraded in any way. It just got printed with extra material. See photos.

• Handset metal is immaculate, hand lume is white & clean. Sweep hand lollipop lume is slightly toned towards tan.

• Case has not been polished - original with signs of wear. Brushing is present, edges are sharp.

• Caseback has some tool marks.

• Insert has wear but is original in all respects.

• Case is fully cleaned and shiny. No pitting or damage to sealing surfaces. New seals.

• New KVW hardlex 320W34GA00 crystal.

• Crown threads and crown tube threads are excellent. 3+ finger turns to seat, smooth threading.

• Watch only - no box or papers.