Bracelet
Case
Crown
MovementDial
Chapter Ring
Bezel RingBezel Insert
Hour handMinute handSecond hand

Curated build guide

SSK/NH34 GMT Divemaster Black build guide

9 parts$495 est.1/5 · beginner

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Parts in this build

SKX013 Watch Case - 38mm [NH34-Ready]

Case

SKX013 Watch Case - 38mm [NH34-Ready]

$71

Buy
SKX013 Submariner Bezel - Silver Mirror Polished

Bezel ring

SKX013 Submariner Bezel - Silver Mirror Polished

$42

Buy
SKX013 Ceramic Bezel Insert (Slope) - GMT 24H - Pepsi Blue/Red

Bezel insert

SKX013 Ceramic Bezel Insert (Slope) - GMT 24H - Pepsi Blue/Red

$48

Buy
SKX013 Brushed Black Chapter Ring

Chapter ring

SKX013 Brushed Black Chapter Ring

$20

Buy
SKX013 Big Crown - Coin Edge

Crown

SKX013 Big Crown - Coin Edge

$20

Buy
SSK/NH34 GMT Divemaster Black

Dial

SSK/NH34 GMT Divemaster Black

$38

Buy
Mercedes Black Finish

Hands

Mercedes Black Finish

$25

Buy
Seiko (TMI) NH34 Automatic Movement - GMT Date (White)

Movement

Seiko (TMI) NH34 Automatic Movement - GMT Date (White)

$152

Buy
Jubilee Bracelet 20/16mm

Bracelet

Jubilee Bracelet 20/16mm

$79

Buy

Build checkpoints

Plan parts here. Learn technique from the linked guides.

New to watch modding? Read the beginner guide.
1/5 · beginner
  1. Checkpoint 1

    Pair the dial and movement

    Checkpoint: confirm the dial feet line up with the movement and any date/day window sits correctly before mounting.

  2. Checkpoint 2

    Set the hands

    GMT hand-setting adds another layer. Review a full hand-setting guide, fit the 24-hour hand first, then check clearance before pressing the hour, minute, and second hands.

    GMT build with an NH34 movement — fit the 24-hour hand at the correct depth before the hour/minute hands.
  3. Checkpoint 3

    Seat the movement in the case

    Checkpoint: test-fit the movement/dial/hands assembly in the case, then confirm the movement holder or spacer seats cleanly before closing anything.

  4. Checkpoint 4

    Fit the chapter ring

    Checkpoint: seat the chapter ring and confirm its markers align with 12 o'clock and the date/day window if the build has one.

  5. Checkpoint 5

    Fit the bezel ring

    Checkpoint: confirm the bezel ring matches the case platform, then test the click/rotation before fitting the insert.

    This bezel ring is matched to the skx013 platform family — cross-family rings from a different case platform may not seat correctly.
  6. Checkpoint 6

    Fit the bezel insert

    Checkpoint: this bezel takes a separate insert, so confirm alignment and press it evenly to avoid cracking or a crooked scale.

  7. Checkpoint 7

    Fit the crown

    Checkpoint: crown and stem fitting can require trimming. Confirm winding, hand-set, and date-set positions before sealing the case.

  8. Checkpoint 8

    Close the caseback

    Checkpoint: inspect for dust, confirm the gasket is seated, then close the caseback without shifting the crown or movement.

  9. Checkpoint 9

    Fit the strap or bracelet

    Checkpoint: fit the spring bars, then tug-test the strap or bracelet and confirm end links sit flush against the case.

Tools and consumables

Dust BlowerRequired
Rodico Cleaning PuttyViewWatchmaker's LoupeView
Movement HolderRequired
Hand Setting & Removal KitView
Crystal / Bezel PressRequired
Case Back WrenchView
Replacement GasketsRequired
Spring Bar ToolView
Correct-Size Spring BarsRequired