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Seiko 7S26 / NH23 Parts

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On saleSEIKO Turtle Diver hands 6309 7040 / 7049 - 12BF2LKM SDE091 hour, minute & second - Watch Plaza
Save €15,01Seiko 4408171 Plastic Dial Spacer Ring for 7S26, 7S36, 4R36, 4R35, NH36 & NH35 - Watch Plaza
Save €50,01Dial Seiko SRP495, SRP491, SRP499, SRP500 Superior Stargate II Black 4R36 - 02Z0 - Watch Plaza
Save €5,01Seiko 81332049 Click Spring 4R36 - 01J0 2nd Gen Monster Orange - Watch Plaza
(5.0)
Save €7,01Seiko 0G330BA11 Bezel Gasket SRP307 / 4R36 - 01J0 2nd Gen Monster - Watch Plaza
(5.0)
Save €8,01Seiko 3AX125F2ALJ seconds hand SKX007, SKX009, SKX175 Diver 7S26 - 0020, 7549 7000, 7009 - Watch Plaza
On saleSeiko Turtle Diver Steel Watch Band 22mm 7S26 - 0020 - SKX007 SKX009 - Watch Plaza
Seiko
Seiko Turtle Diver Steel Watch Band 22mm 7S26-0020 - SKX007 SKX009 Sale priceFrom €59,99 Regular price€150,00
(5.0)
SEIKO 6R15D Movement 6R15 00G0 01K0 01D0 02X0 03R0 02S0 03W0 03X0 04G0 01H0 - Watch Plaza
Seiko SKX007 / SKX171K1 Watch Band SKXA63P9 & SDS099P1 Black Silicon Strap Z 22 mm 4FY8JZ - Watch Plaza
Save €17,01Seiko SKX779J1 crystal glass 7S26 - 0350 1st Generation Monster - Watch Plaza
(5.0)
Save €21,01Seiko B1497S Watch band SCWG, SNX - 7009 & 7S26 grey stainless steel 19 mm - 5 - Watch Plaza
Save €40,01SEIKO 5 SNX809 MILITARY BLACK DIAL 7S26 - 0480 7S26 - 3040 GENUINE SNX809K1 - Watch Plaza
Save €5,01Seiko 2FX125FABL1 Minute Hand SKX007 Diver 7S26 - 0020, 7S26 - 7020 & 7548 - 7000 - Watch Plaza
Save €5,00Seiko SRP455J1 Gold Crown With Stem 4R36 - 02B0 - Superior Blue Monster - Watch Plaza
Seiko 7S26002LXL19 Dial SKX009 & SKX175 Diver - Watch Plaza
Save €55,01Seiko U7S2624C Automatic Movement 7S26 - SKX007, 009, 011, 013, 031 & 171 Diver - Watch Plaza
Save €20,01Seiko 1E70A3SNW0 Crown With Stem SKX007, SKX009, SKX011 & SKX171 Diver
Seiko C200FS Spring Bar 20 mm Fat Bar
Seiko 3AX110F1AKW Second Hand SKX001, SKX013 & PL4023 - Watch Plaza
Watch Band Seiko 5 Sports 7S26 - 02J0 / 7S26 - 03S0 stainless steel strap 18mm 3303 - Watch Plaza
Clasp Seiko H01R11SA07B 16mm Kinetic 7T32, 7N00, 7N42, 5M62, V732, 5M42, V739, 8F56, 8F32 - Watch Plaza
Seiko 86600630 Glass Gasket SKX007, SKX009, SKX011 & SKX171 - Watch Plaza
Bezel click spring / ratchet for Seiko 7S36 03E0, 00Y0, 00L0, 00G0 models SNZF 5 Sports - Watch Plaza
Seiko 7T32, 5M42, 6M25, 8F35, 5J22, V736, 5M63, V147, H801 click spring ratchet 81332899 - Watch Plaza
Seiko 2FX110FABBS Minute Hand SKX001, SKX013 & PL4023 - Watch Plaza
Save €40,01Seiko SRP853 Dial SRP853J1 & SRRY027 Presage Red 4R3502D2XR13
(5.0)
Save €45,01Seiko SKX007J1 Black Bezel 7S26 - 0020 Authentic SKX007J1 41mm - Watch Plaza
Seiko
Seiko SKX007J1 Black Bezel 7S26-0020 Authentic SKX007J1 41mm Sale price€104,99 Regular price€150,00
(5.0)
Save €35,01Case back Seiko 5 7S26 - 02J0 original SNK809, SNK805, SNKN29, SNKN31, SNKM81 - Watch Plaza
Seiko 2FB125FCBE3 Minute Hand SRP309, SRP311, SRP315 & SRPD03 - Watch Plaza
Seiko 6R15 & 7S36 plastic spacer dial holding ring for Sumo SBDC001, SBDC005, SBDC033 & SKX - models - Watch Plaza
Save €12,01Seiko 1FX075FFBE3 Hour Hand SRP309, SRP311, SRP315 & SRPD03 - Watch Plaza
(5.0)
Seiko 0878207 Date - Disc 7S26, 7S36, 4R36 & 4R37 Diver - Watch Plaza
Seiko 0160300 day wheel disc BLACK English/French for 7S26 - 0020, 0030, 0040, 7020, 0110 - Watch Plaza
Save €10,01Seiko 1FX075FFBEW Hour Hand SRP307, SRP581, SRP637 & SRP639 - Watch Plaza
(5.0)
Save €30,01Seiko 8601469C Bezel SKX011 Diver
Seiko
Seiko 8601469C Bezel SKX011 Diver Sale price€109,99 Regular price€140,00
(5.0)
Save €15,01Seiko Diver SKX013, SKX001, SKX005, SKX407 crown with stem 7S26 - 0010, 0030, 0170 - Watch Plaza
Seiko 3AX125F2AKS Second Hand SKX171, SKX169 & SBBW009 Diver - Watch Plaza
Seiko 2FB125FCBEW Minute Hand SRP307, SRPE85, SRP637 & SRP639 - Watch Plaza
Seiko 7009 - 3040, 3041 & 7S26 - 0480 Watch Band B1375S - Watch Plaza
Save €15,01Seiko 3246JZ Watch Band 7S26 01V0 - SNK377K1, SNK381K1, SNK385K1 Stainless Steel 3246 - Z.E - Watch Plaza
Seiko EZ0140B0A Crown Gasket 4R36 - 01J0, 6R15 - 00G0 & 7002 - 7000 - Watch Plaza
Save €20,01Seiko 7S2607S4XG14 Dial SNKE06K1 5 Sports - Watch Plaza
Seiko
Seiko 7S2607S4XG14 Dial SNKE06K1 5 Sports Sale price€59,99 Regular price€80,00
(0.0)
Seiko 1FH080FBBSW Hour Hand SNX427 & SNX809 Field - Watch Plaza
Seiko 300PA2HN02 Crystal Glass SHC053, SHC055, SHC057 & SHC061 - Watch Plaza
Save €65,01Seiko SKX173P1 Black Bezel 7S26 - 0029 Authentic SKXA55K1 41mm Bullet Diver - Watch Plaza
Seiko 3AX125FEASM Second Hand SKX779, SKXA43, SZEN002 & SLR001 Monster - Watch Plaza
Seiko 3BA135F3BNS Second Hand SRPG07J1, SSA423J1 & SSA451J1 - Watch Plaza
Seiko 1FX075FFBSW Hour Hand SRP653 & SRP655 Baby Tuna Prospex - Watch Plaza

The NH23 and the 7S26 movements are quite similar because they are both simple, reliable automatic movements produced by Seiko Instruments Inc. (SII). However, the NH23 is a more modern version designed for external manufacturers (e.g., microbrands), while the 7S26 was exclusively used in Seiko watches. Here are the key differences and similarities:


Similarities

  1. Mechanical Base:

    • Both are automatic movements without manual winding or hacking features.
    • They share similar specifications:
      • Beats per hour (BPH): 21,600.
      • Power reserve: Approximately 40 hours.
      • Number of jewels: 21.
  2. Use Case:

    • Both are designed for entry-level, affordable watches.
    • Renowned for their simplicity, reliability, and low maintenance.
  3. Day and Date Complication:

    • Both movements feature a day-date function, often with the day displayed in two languages (depending on the watch).

Differences

Feature NH23 7S26
Purpose Designed for external manufacturers (microbrands, aftermarket). Exclusive to Seiko watches.
Production Modern version, still in production. Discontinued, no longer produced.
Calibration Basic settings, often adjusted by the manufacturer. Pre-calibrated by Seiko for their watches.
Parts Availability Easily available in aftermarket. Harder to find due to discontinued status.
Rotor Branding Unbranded or marked with "SII". Seiko-branded.
Compatibility Compatible with a wide range of watch cases. Specific to Seiko watch cases.

Advantages of the NH23 Over the 7S26

  1. Availability:

    • The NH23 is still in production and readily available from aftermarket and wholesale channels.
    • The 7S26 has been discontinued, making it harder to source complete movements or spare parts.
  2. Flexibility:

    • The NH23 is widely used by microbrands and external manufacturers, offering greater versatility.
    • The 7S26 was limited to Seiko watches, making it less adaptable for aftermarket use.
  3. Modernized Production:

    • While functionally similar, the NH23 benefits from more modern production techniques, potentially offering improved consistency and reliability.

When to Choose Which?

  • NH23:

    • Best for new watches, microbrand projects, or aftermarket replacements.
    • Ideal when you need a modern, widely available movement.
  • 7S26:

    • Only relevant for repairing Seiko watches or vintage projects where using an original Seiko movement is essential.

Conclusion

The NH23 is essentially a modern, aftermarket-oriented version of the 7S26. The primary difference lies in availability and target audience: the NH23 is versatile and designed for broader applications, while the 7S26 is a classic Seiko movement that was exclusive to Seiko watches.