Seiko 62MAS

Seiko 62MAS

1965 marked the maiden voyage of a submersible that in its five decades of loyal service would be witness to some of the greatest breakthroughs in deep sea exploration, like the discovery of deep sea vents in the 1970s and the wreck of the RMS Titanic in 1986.

The DSV Alvin was conceived as a replacement for the bathyscaphes used by Jacques Piccard and others. Use of a new material, syntactic foam, resulted in a more maneuverable Deep Sea Vehicle that could respond to the changing needs of underwater explorers. Syntactic foam—comprised mainly of a metal, ceramic or polymer that was then filled with hollow glass bubbles called microballoons—gave this new DSV more buoyancy than the metal bathyscaphes, while sacrificing nothing in terms of safety and tensile strength.

At 17 tons and 23 feet in length, Alvin might have been smaller than the bathyscaphe Trieste that ferried Jacques Piccard to the bottom of the Marianas Trench, but Alvin’s compact size meant that it could withstand dives at a depth of 8,010 feet.

Alvin’’s first manned dive took place on July 20, 1965, off Andros Island in the Bahamas, where it descended to an impressive 6000 feet or 1800 meters.

In the Deep Sea Vessel’s first dives, Alvin was used to locate a hydrogen bomb lost during the collision of a B-52G bomber and a KC-135 tanker during mid-air refueling; later, Alvin located the wreckage of an F6F Hellcat aircraft that was lost during the Second World War.

Though the Alvin would go on to discover the wreckage of the RMS Titanic in the 1980s, the 1960s represented a pivotal time in the history of deep sea exploration, in which the use of new technologies enabled humans to dive deeper and to remain submerged longer than had ever been achieved before.

Faced with the popularity of recreational diving, as well as the needs of professional deep sea divers or underwater welders, the watch industry adapted to release watches that could withstand the rigors of deep sea use.

The success of Swiss dive watches such as the Rolex Submariner and the Blancpain Fifty Fathoms in the 1950s and 60s prompted another brand on an entirely different continent to follow suit. Since the 1880s, Seiko had been producing timepieces to rival their Swiss counterparts, but were relatively unknown to Western consumers. But the 1960s saw increased exposure to the Seiko name on a worldwide scale, in part due to the 1964 Summer Olympics, which were held in Tokyo.

As official timekeeper for those Olympics, Seiko had produced its first chronograph, The Crown. Their participation in the Olympics inspired a sense of heightened pride in Japanese engineering and manufacturing. 

So when Seiko sought another category to prove its competitiveness with the Swiss, it was naturally a diver. 

Seiko released its first dive watch in 1965, the Reference 6217, which was water-resistant to 150 meters and, like the Submariner and Fifty Fathoms, had a rotating bezel, luminous hour markers, and a 17-jewel movement (Calibre 6217) with a beat rate of 18,000.

The 6217—also know as 62MAS (for autoMAtic Self-dater)—was designed to be a workhorse. At 37mm, the case, with its sloping lugs that cling to the wrist, was intended to eliminate any potential weak points. However, the fickle nature of the 62MAS’s gaskets—as well as the lack of a screw-down crown—often led to a build-up of helium which in turn could cause the crystal to pop off.

Additionally, the lume of the hour markers and hands was prone to discoloration due to age, or wabi, a quality that is particularly desirable in Seiko collectors’ terms. Seiko, inspired by a letter from a disgruntled 6217-owner, would go on to revolutionize dive watches with the Tuna line of dive watches in the mid-1970s. However, despite being discontinued, the 6217 continues to enjoy popularity with collectors of vintage Seikos.

Also, the recent reissue of this model makes the original versions even more desirable.

This particular 62MAS dates from 1967, toward the end of its production run (it would be discontinued in 1968). The case—especially the rotating bezel and the dial—show quite a lot of wabi. With its robust movement recently serviced, this dive watch is ready for many more years of faithful service.


SKU: AS01955

Stainless steel case is approximately 37mm (excluding crown). Seiko Reference 6217-8001. Seiko Calibre 6217-8001 Self-Winding Movement. Circa 1967.

Overall Condition: Stainless steel case is in good condition, with sharp lugs and showing no signs of over-polishing. Case does have signs of use and wear commensurate with age, including some dings and scratches on the sides of the case and the lugs. Rotating bezel likewise shows signs of use and age, including some scratches and fading throughout. Dial is in very good condition, showing a green patina to the luminescent elements of the hour markers. The hour marker at 12 has been re-lumed. Signed crown. Signed case back shows signs of wear, including one deep tool mark.

Includes one 18mm rubber Tropic style strap.

More pieces you may enjoy

Rolex Oyster Perpetual Ladies
Ref. 76193 Circa 2001
$ 2,950.00
Rolex Pearlmaster 34
Ref. M81319 Circa 2010s
$ 30,120.00
Rolex GMT-Master II 'Swiss Only'
Ref. 16710 Circa 1997 With Hangtag And Papers
$ 18,900.00
Rolex Milgauss
Ref. 116400V Circa 2014
$ 6,750.00


Thank you for your interest in the Tudor Oysterdate Big Rose. Please fill out the form below and we will get back to you shortly.


Our Pledge

Analog/Shift stands behind the authenticity of our products in perpetuity.


We back each Analog/Shift vintage timepiece with a one-year mechanical warranty from the date of purchase.


All of our watches include complementary insured shipping within the 50 states. We are happy to hand deliver your purchase in Manhattan or you may pick it up at our showroom.

International Buyers

Please contact us prior to purchase for additional details on shipping and payment options