SEIKO NH35 vs MIYOTA 8215 Automatic Movement

Micro-brands or trendy fashion watch brands commonly use Seiko TMI movement or Citizen automatic Miyota movement as their durability, accuracy, and cost-effectiveness.
Here is the comparison of these two standard three hands date calendar movements by Seiko NH35 and Citizen Miyota 8215 movement.

nh35 vs miyota 8215

NH35 vs Miyota 8215

ITEMSEIKO TMI MOVEMENTCITIZEN MIYOTA MOVEMENT
Model NumberNH358215
Movement TypeStandard AutomaticStandard Automatic
Functions3 Hands with Date Calendar3 Hands with Date Calendar
Movement Diameter27.4mm26mm
Movement Thickness5.32mm5.67mm
Jewels24 Jewels21 Jewels
Duration Time41 Hours42 Hours
Accuracy-20s~+40s per day-20s~+40s per day
Frequency21600 vibrations per hour21600 vibrations per hour
WindingManual&Automatic WindingManual&Automatic Winding
RotorWith Ball BearingWithout Ball Bearing

Seiko NH35 and Miyota 8215 movement have very similar specifications but in fact they are very different.

seiko nh35
miyota 8215 movement

1, Seiko NH35 movement has a thinner thickness but a wider diameter than Miyota 8215 movement. So NH35 movement could fit for a slimmer case, while 8215 automatic movement is better for a smaller diameter watch.

2, Seiko NH35 movement has 24 Jewels compared with 21 jewels on Miyota 8215 movement. The jewels are used for bearing all the precise components or gears of the movements for long-lasting working. It suggests NH35 movement has a more precise structure than Miyota 8215 movement.

8215 automatic movement
nh35 movement

3, Many people complain that the Miyota 8215 movement is noisy because the rotor rotates too fast.The Seiko NH35 movement is quiet and stable.

4, The rotor of Miyota 8215 movement is made without ball bearing which is convenient for custom-made rotor changing and after-sale service by watchmakers or customers themself. The ball bearing of Seiko NH35 jointed on the rotor makes it difficult for custom-made design and maintenance.

5, 8215 automatic movement rotor rotates quickly and smoothly with your wrist swinging slightly. It benefits the automatic winding easier to keep the time running uninterruptedly. Seiko NH35 movement has a very stable rotor but sometimes is hard to rotate automatically that it needs to do manual winding more frequently.

SS Case Miyota 8215 Movement Sandwich Dial Swiss Lumi-Nova Sapphire

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Case:316L Stainless Steel Case
Size:45mm
Strap:Tan Genuine Leather or Silicone
Dial:Double Layers Swiss Super-LumiNova Markers
Hands:Diamond Cut Swiss Super-LumiNova
Movement:Japan Miyota 8215 Automatic Movement
Glass:Anti-reflective Sapphire Crystal
Waterproof:10atm/10bar
Inventory:In Stock without Logo
Customization:MOQ 2pcs-Laser Texts on Back, MOQ 20pcs-Logo Printing on Dial,
MOQ 300pcs-All Customization

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Pardwin is the OEM&ODM automatic diving watches manufacturer with SA8000 and ISO9001 factory certifications.

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