Seiko (SII/TMI) NH38 NH38A Automatic Movement – Regulated – CT505


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  • NH38A Automatic
  • NO date or day feature
  • 21600 BPH
  • 24 Jewels Hacking Hand-wind
  • Power Reserve 41hrs
  • Complete with stem
  • Hand sizes H/M/S 150/89/21
  • Ligne/mm size 12/26.00mm
  • Height 5.32mm
  • Height with cannon pinion 7.55mm

Description – Brand new 100% genuine Seiko SII movement incl full length stem supplied regulated

  • Please note – We also manufacture an extensive range of Crowns.
  • Professionally Regulated Movement.
  • All our movements are fully checked and regulated by our master watchmaker before shipping to the customer.
  • INFO – You are purchasing a complete movement please ensure you are fully aware of the work required and parts needed to complete your build. If you are unsure and not undertaken this before, please do appropriate research before purchase. The forums and YouTube are an excellent resource. Check our education page for an excellent tutorial video link if you are planning to do this work.
  • Ref dimensions – OD 27.4mm Casing Dia 29.36mm (with dial spacer)
  • Suitable for – Watch modding 7S26 upgrade
  • Additional info – A very popular modding movement. Upgrade to 24 Jewels with hacking and hand winding feature. Used for no day/date dials and suitable for “open heart” dial option
  • RETURNS – In accordance with the normal practice in the trade regarding movements we unfortunately are not able to accept returns on this item.
  • Backorder Info – if you purchase this item when it is in backorder status we generally restock it within a week. The website will say “Available on backorder” if the item is being restocked in backorder status.  If you need a specific time of when the item will be ready to ship in backorder status please reach out to us.

11 reviews for Seiko (SII/TMI) NH38 NH38A Automatic Movement – Regulated – CT505

  1. Michael Smith (verified owner)

    Verified reviewVerified review - view originalExternal link

    Movement is running well so far and I expect it to continue.

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