Seiko Chronograph Automatic 6138-0030 (KAKUME) or (BIG BLUE) is one of the most desirable vintage seiko chronographs. Here I present you one 100% authentic without any aftermarket parts. Otherwise, this is a rare version with a yellow chronograph hands, they are mostly with red chronograph hands.
This mine is total MINT, it is produced in March 1974, no one modern watch can match in quality and beauty with it.
If you have this watch it will shine with its full beauty only on the original bracelet, do not put it on the leather strap at all, it does not suit to this watch.