🛠 How to Make a Custom NH35 Watch

1. Understand What You’re Building

• You’re making a mechanical watch powered by the Seiko NH35 automatic movement.
  
  

• You need basic tools and parts.
  
  

2. What You Need

✅ NH35 Movement (buy online)
✅ Watch case (NH35 compatible)
✅ Dial (with feet positioned for NH35)
✅ Hands (hour, minute, second, sized for NH35)
✅ Chapter ring (optional, matches the case)
✅ Crown + stem (stem may need trimming)
✅ Caseback (solid or see-through)
✅ Crystal (often pre-installed in case)
✅ Gasket set (for water resistance)
✅ Strap or bracelet (20mm, 22mm, etc.)

Tools:

• Hand press or hand setting tool
  
  

• Tweezers
  
  

• Screwdrivers (small)
  
  

• Case back opener
  
  

• Stem cutter or file
  
  

• Rodico (putty for cleaning)
  
  

• Loupe (magnifier)
  
  

3. Simple Build Steps

Step 1: Prep the Movement

• Carefully open the movement box.
  
  

• Set the stem and crown onto the movement to handle it without touching.
  
  

Step 2: Install the Dial

• Align dial feet into NH35 movement.
  
  

• Gently press it down or screw it in, depending on the movement.
  
  

Step 3: Install the Hands

• Set time to 12:00 first.
  
  

• Use hand press to install:
  
  

  1. Hour hand
     
     

  2. Minute hand
     
     

  3. Second hand
     
     

• Make sure hands are straight and don’t touch each other.
  
  

Step 4: Trim the Stem

• Insert movement into case.
  
  

• Measure how much of the stem sticks out.
  
  

• Remove stem, cut it shorter, and reattach crown.
  
  

Step 5: Case the Movement

• Put the movement (with dial and hands) into the watch case.
  
  

• Secure it (sometimes with case clamps and screws).
  
  

Step 6: Close It Up

• Install the gasket.
  
  

• Screw or press the caseback on.
  
  

• Check that the crown works (time setting, winding).
  
  

Step 7: Add the Strap

• Attach the strap or bracelet to the case lugs.
  
  

4. Final Checks

• Make sure the hands move without rubbing.
  
  

• Set the time and date.
  
  

• Wind it up and watch it tick!
  
  

• (Optional: Use a timegrapher to regulate accuracy.)
  
  

✅ Done! You built a custom NH35 watch!

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