SOLD - Rare Vintage 1970's Seiko Automatic Chronograph Caliber 6138 All Original Blue with Gold Vertical Subdials
SKU:
$995.00
$850.00
$850.00
per item
A Seiko purists dream, this rare 6138 "Helmet Lugs" Chronograph Represents an important milestone in horology. The Seiko 6139 and 6138 series are the first fully integrated automatic chronograph in the world featuring column wheel and vertical coupling mechanism. With this movement, they have set the standard which was followed by the Swiss watch industries 20 years later. The same movement configuration was adopted by Rolex when it made its own in-house movement for Daytona in the year 2000, 30 years after Seiko released the caliber 6139 and 6138.
The 6138 was the successor of the 6139 automatic chronograph movement but produced in parallel until 1979. The 6138 was technically at least equal to his Swiss counterparts as it had a fully integrated chronograph. There were two versions of the 6138, the 6138A introduced in 1970 had 21 jewels. The 6138B was introduced a bit later with 23 jewels. Both feature a column wheel that regulates the chronograph functions; and a vertical clutch mechanism for the engagement. It is still considered to be superior over the mechanically more simple Cam Actuated movements. The movement diameter measures 27.4mm and a height of 7.9mm. The "speed" is 21.600 a/H. This watch is completely original except the replacement strap which is a new high-grade Hadley Roma dark brown strap featuring medium padding, genuine leather and a square cut alligator design with a stainless steel buckle. Please note that this watch has many surface scratches on the original glass crystal. They are not too noticeable in indoor and shaded lighting; they are all surface scratches so they become presentable with sunlight and glare. The side photographs should give you a good idea of what I mean. Since the crystal isn't compromised nor has any large chips, cracks or large scratches, we've decided to keep it on and leave is original. If the purchaser would like a new crystal installed, we will do so free of charge upon purchase with a Seiko replacement - you just need to let us know in the checkout notes, contact page or call - this will add approximately 5-7 days to shipping if you choose a new crystal. This watch is recently serviced and is working well. Thank You!
The 6138 was the successor of the 6139 automatic chronograph movement but produced in parallel until 1979. The 6138 was technically at least equal to his Swiss counterparts as it had a fully integrated chronograph. There were two versions of the 6138, the 6138A introduced in 1970 had 21 jewels. The 6138B was introduced a bit later with 23 jewels. Both feature a column wheel that regulates the chronograph functions; and a vertical clutch mechanism for the engagement. It is still considered to be superior over the mechanically more simple Cam Actuated movements. The movement diameter measures 27.4mm and a height of 7.9mm. The "speed" is 21.600 a/H. This watch is completely original except the replacement strap which is a new high-grade Hadley Roma dark brown strap featuring medium padding, genuine leather and a square cut alligator design with a stainless steel buckle. Please note that this watch has many surface scratches on the original glass crystal. They are not too noticeable in indoor and shaded lighting; they are all surface scratches so they become presentable with sunlight and glare. The side photographs should give you a good idea of what I mean. Since the crystal isn't compromised nor has any large chips, cracks or large scratches, we've decided to keep it on and leave is original. If the purchaser would like a new crystal installed, we will do so free of charge upon purchase with a Seiko replacement - you just need to let us know in the checkout notes, contact page or call - this will add approximately 5-7 days to shipping if you choose a new crystal. This watch is recently serviced and is working well. Thank You!
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