Men's SEIKO 6309-7049 Automatic Diver Original Strap
Here is a nice, all original example of a 6309 including the original GL831 strap. It needs to be serviced because although the numbers are good, it stops after a couple of hours. This makes me think it is just really dry inside. The crown turns with 4 turns and the bezel turns nicely without any play.
No cracks on the strap, a few scratches on the crystal. A very nice example. If you want to save the original strap I will include an UncleSeiko GL831 ($39) with the purchase.
See pictures for best description. International buyers must pay for Express Priority ($70) tracked and signed.