When it was introduced in 1963, the Seiko Sportsmatic 5 heralded multiple innovations. The first was the Diaflex mainspring, Seiko’s unbreakable mainspring. Another was the Diashock shock-resistant design, Seiko’s answer to the Swiss Incabloc system. Yet another was overall water resistance — although in those days the words “water proof” were used (a labeling that would have the Federal Trade Commission scrambling their lawyers if it occurred today). In any case, this third attribute was less a technological innovation and more an innovative design criteria for the Seiko 5 sub-brand.So what does the “5” mean anyway? There is some disagreement. Tradition (and many an online watch forum entry) says it’s for the following five key attributes of all Seiko 5 watches:
1. The Diaflex mainspring
2. The Diashock system
3. Automatic winding
4. Day/date indication
5. Water resistance
(Some sources combine Diaflex and Diashock while separating Day and Date.)
However, Seiko’s website commemorating the 50th Anniversary states a slightly different, somewhat more general set of attributes:
1. Automatic winding
2. Day/date displayed in a single window
3. Water resistance
4. Recessed crown at the 4 o’clock position
5. Durable case and bracelet
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Seiko 5 100M X Black and White Checkered Flag Timer Special Edition Automatic Watch SRPK67K1
Regular price₱16,999.00 PHP Regular priceUnit price per₱19,050.00 PHP ₱16,999.00 PHP Sale -
Seiko 5 100M X Petrol Blue Checkered Flag Timer Special Edition Automatic Watch SRPK65K1
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Seiko 5 Sports 100M GMT Style All Black Automatic Leather Strap Watch SSK025K1
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Seiko 5 Sports 100M GMT Style Black Dial Automatic Watch SSK023K1
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Seiko 62MAS Prospex Blue Clearwater Marinemaster Men's Stainless Steel Watch SJE099J1
Regular price₱136,999.00 PHP Regular priceUnit price per₱171,050.00 PHP ₱136,999.00 PHP Sold out -
Seiko 62MAS Prospex Black Dark Water Marinemaster Men's Stainless Steel Watch SJE101J1
Regular price₱136,999.00 PHP Regular priceUnit price per₱171,050.00 PHP ₱136,999.00 PHP Sold out -
Seiko 62MAS Prospex LE White High Water Marinemaster Men's Stainless Steel Watch SJE097J1
Regular price₱145,999.00 PHP Regular priceUnit price per₱171,050.00 PHP ₱145,999.00 PHP Sold out -
Seiko 5 100M X New Double Hurricane Special Edition Automatic Watch SRPK11K1
Regular price₱16,999.00 PHP Regular priceUnit price per₱18,550.00 PHP ₱16,999.00 PHP Sale -
Seiko 5 100M X New Rally Timer Special Edition Automatic Watch SRPK09K1
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Seiko 5 100M X Regatta Timer Special Edition Automatic Watch SRPK13K1
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Seiko 5 100M 55th Anniversary Limited Edition Automatic Watch SRPK17K1
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Seiko 5 100M X Masked Rider Limited Edition Automatic Watch SRPJ91K1
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Seiko 5 100M X Honda Super Cub Limited Edition Automatic Watch SRPJ75K1
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Seiko 5 100M Flieger Suit Style Champagne Dial Automatic Leather Strap Watch SRPJ87K1
Regular price₱12,499.00 PHP Regular priceUnit price per₱15,650.00 PHP ₱12,499.00 PHP Sale -
Seiko 5 100M Flieger Suit Style Green Dial Automatic Leather Strap Watch SRPJ89K1
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Seiko 5 100M Field Sports Style Sand Dial Automatic Nato Strap Watch SRPJ83K1
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