Which Japanese movement wins? A detailed analysis of Seiko and Miyota movements

"Which Movement Wins? A Detailed Look at Seiko and Miyota Mechanisms"

When it comes to reliable, affordable watch movements, two Japanese giants dominate the market: Seiko and Miyota. Whether you're buying an entry-level automatic or a precision quartz watch, understanding these movements helps you make an informed choice. Let's break down their key differences, strengths, and ideal uses.

1. Seiko Movements: Precision with Heritage

Key Series:

• 7S26/4R36/NH34A (Automatic): Rugged, no-hacking (in older models), 40-70hr power reserve

• 8L/9S (High-End): Premium accuracy, refined finishing

• Quartz (9F): Ultra-accurate (±10 sec/year), thermo-compensated

Pros:
✔ Proven durability (used in divers like the SKX)
✔ In-house manufacturing (vertical integration)
✔ Smooth sweeping seconds (higher beat rates)

Cons:
✖ Older automatics lack hand-winding
✖ Service costs can approach movement replacement price

Best For: Tool watches, everyday wear, and collectors who value heritage

2. Miyota Movements: Affordable Workhorses

Key Series:

• 9000 Series (Automatic): Reliable, 40hr power reserve

• MIYOTA 2035 Series (Quartz): Ultra-thin, cost-effective

• Precision Quartz (F06/F12): Solar options available

Pros:
✔ Extremely affordable to replace
✔ Widely available (used by many microbrands, including some Wishdoit watches)
✔ Low maintenance

Cons:
✖ Rotor noise in some automatics
✖ Less prestige than Seiko's in-house movements

Best For: Budget-conscious buyers, fashion watches, and reliable everyday beaters

3. Head-to-Head Comparison（Take wishdoit watch as an example）