Vintage 1970 JAPAN 45 KING SEIKO CALENDAR 4502-7001 25Jewels Hand-winding.

Vintage 1970 JAPAN 45 KING SEIKO CALENDAR 4502-7001 25Jewels Hand-winding.

Welcome to my auction!
I am Japanese who live in Tokyo.

Item description

Movement :

• Pet name : 45 KING SEIKO CALENDAR .
• Caliber number : 4502A.
• Movement : Hand-winding.
• Beat rate : 36000bph.
• Year of manufacture start : 1969's.
• Factory : Kameido.

Externals :

• Serial No. : 090523.
• Dial No. : JAPAN 4502-7000T AD.
• Glass : Acrylic.
• Case size : About 36.3mm.
• Lug width : 18mm.
• Band : New Leather Strap of SEIKO original.

Condition :

• Used, it runs well.
• Quick set(Day/Date) : Okay.
  Set of the date : The set at one stage pulling the crown.
• The day difference time of an used watch is about +-1 minute / day.
• For practical, everyday use, it would be advisable to have the movement cleaned and oiled.

Key Features

The Pinnacle of High-Beat Engineering (1973): By **1973**, the **45KS** stood as the final and most refined manual-wind King ever produced. Coming from the **Daini Seikosha (Kameido)** factory, this model represented the commercial application of the technology that allowed to dominate Swiss Observatory Chronometer trials. The reference **4502-7001** is the ultimate expression of mechanical purity before the era of quartz dominance.

The Legendary Caliber 4502: This watch is powered by the **25-jewel Caliber 4502**, a true ""High-Beat"" movement operating at **36,000 vibrations per hour (10 beats per second)**. This ultra-fast frequency provides incredible stability against external shocks and a mesmerizingly smooth sweep of the seconds hand. It is widely considered by horologists to be one of the **best manual-wind movements ever made in Japan**, featuring a robust construction and an instantaneous date-change mechanism.

Architectural ""7001"" Case Design: The reference **4502-7001** is a definitive example of the **Grammar of Design**. Its case is characterized by razor-sharp, flat surfaces and mirror-polished facets that catch the light with surgical precision. The lugs are bold and powerful, providing a commanding presence on the wrist that remains as modern and architectural today as it was in **1973**.

The Rare Gold ""KS"" Medallion: As a high-end model of the early 70s, the case back features the iconic **gold King medallion**. This gold inset was a mark of supreme craftsmanship and Daini factory's pride. In **1973**, owning a 45KS was a clear signal of elite professional status, offering the owner the same high-beat heart found in the prestigious **Grand 45GS**.

Minimalist Professional Aesthetic: The dial of the **4502-7001** is a masterclass in clarity. Featuring a crisp white or sunburst silver finish with hand-applied, multi-faceted indices, it prioritizes **instant legibility**. The ""Calendar"" window at 3 o'clock and the ""HI-BEAT"" inscription at 6 o'clock serve as subtle reminders of the high-performance engineering ticking within this horological masterpiece.

For more information, please look at the pictures.

Notes

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