[safetypro79]

Looking at this 6309 I just got, seems the springbar tip holes in the lugs are a bit larger than the 007 holes they are not enlarged nor rusted,

If this is correct the 6309 would take a larger tip sized end, i.e. I think the 007 tip ends are .80mm or 1mm

Still a 22mm/2.5mm diameter

Years ago I heard the 6309's took a different Seiko part numbered springbar

Any 6309 experts know for sure? If where can they be obtained, again years ago (at least 10) There was a large Seiko parts distributor in Denver or Colrado that I got some from.

 

[7s26b]

22mm SKX fat bars are 1.1mm at the ends. You might have to measure your watch's bar hole and see if there's an alternative - unless someone has the old part number stashed.

 

[safetypro79]

COSERV may have part ?

I will call, they sometimes have parts even for 30+ year old watches

Not everything but maybe a part like springbars that get ordered often over the years