Seiko 7S36 movement

1. 7S36 → 7S26

   Fits with changes· not confirmed
   • =diameter7S26’s casing diameter matches 7S36’s movement diameter: 27 mm.
   • ≠height7S26 is 0.1 mm taller (4.9 mm vs 4.8 mm): check the room under the crystal and the case back; the hands sit higher.

2. 7S36 → 4R34

   Fits with changes· not confirmed
   • =diameter4R34’s casing diameter matches 7S36’s movement diameter: 27 mm.
   • ≠functions4R34 adds a 24-hour hand: it needs a dial and hand set made for it.
   • ≠date4R34 has no day wheel: a day-date dial would show an empty day window.

   Not published, so not checked: height for 4R34.

3. 7S36 → NH34

   Fits with changes· not confirmed
   • =diameterAbout the same diameter (27 mm and 12‴; a size in lignes is rounded).
   • ≠heightNH34 is 0.52 mm taller (5.32 mm vs 4.8 mm): check the room under the crystal and the case back; the hands sit higher.
   • ≠functionsNH34 adds a 24-hour hand: it needs a dial and hand set made for it.
   • ≠dateNH34 has no day wheel: a day-date dial would show an empty day window.

   Not published, so not checked: a millimetre diameter for NH34.

4. 7S36 → NH70

   Fits with changes· not confirmed
   • =diameterNH70’s casing diameter matches 7S36’s movement diameter: 27 mm.
   • ≠heightNH70 is 0.52 mm taller (5.32 mm vs 4.8 mm): check the room under the crystal and the case back; the hands sit higher.
   • ≠dateNH70 has no day wheel: a day-date dial would show an empty day window.
   • ≠dateNH70 has no date: a dial with a date window would show nothing in it.

5. 7S36 → NH72

   Fits with changes· not confirmed
   • =diameterNH72’s casing diameter matches 7S36’s movement diameter: 27 mm.
   • ≠heightNH72 is 0.52 mm taller (5.32 mm vs 4.8 mm): check the room under the crystal and the case back; the hands sit higher.
   • ≠dateNH72 has no day wheel: a day-date dial would show an empty day window.
   • ≠dateNH72 has no date: a dial with a date window would show nothing in it.

6. 7S36 → 4R36

   Does not fit
   • ×diameter4R36 is 0.4 mm wider (movement diameter 27.4 mm vs 27 mm): it will not sit in a case cut for 7S36.
   • ≠height4R36 is 0.52 mm taller (5.32 mm vs 4.8 mm): check the room under the crystal and the case back; the hands sit higher.

7. 7S36 → NH36

   Does not fit
   • ×diameterNH36 is 0.4 mm wider (movement diameter 27.4 mm vs 27 mm): it will not sit in a case cut for 7S36.
   • ≠heightNH36 is 0.52 mm taller (5.32 mm vs 4.8 mm): check the room under the crystal and the case back; the hands sit higher.

8. 7S36 → 4R35

   Does not fit
   • ×diameter4R35 is 0.4 mm wider (movement diameter 27.4 mm vs 27 mm): it will not sit in a case cut for 7S36.
   • ≠height4R35 is 0.52 mm taller (5.32 mm vs 4.8 mm): check the room under the crystal and the case back; the hands sit higher.
   • ≠date4R35 has no day wheel: a day-date dial would show an empty day window.

3 more calibres in the group fit less well; compare any of them with the movement comparison.

• Seiko movementsEvery Seiko calibre with its key figures→
• Movement comparisonPut the 7S36 next to up to three other calibres→
• Quartz vs automatic watchWhere the 7S36 sits: accuracy, power and upkeep, in numbers→
• Watch movement types explainedAutomatic, hand-wound, quartz, solar and digital modules side by side→
• Watch accuracy calculatorCheck a 7S36 against Seiko's figures→
• All movementsCatalogue by maker and type→