Plan the parts as a complete assembly. A listing that mentions NH35 does not resolve every dial, hand, holder or crown detail. Record the exact variant and supplier reference for each item before ordering.
| Component | Question to resolve |
|---|---|
| Movement | Which exact calibre and hand-height option is supplied? |
| Case | Which movement and holder is it designed around? |
| Holder or spacer | Is it included, and does it support the intended dial? |
| Dial | Are diameter, feet and date window documented for this combination? |
| Hands | Are mounting dimensions, lengths and vertical clearances confirmed? |
| Crown and stem | Are their references and sealing arrangements suitable for this case? |
| Crystal and back | Are they supplied installed, with enough clearance for the complete assembly? |
| Strap | Are lug width, attachment type and spring bars specified? |
Read drawings before descriptions
The maker's sheet includes casing, dial, hand-fitting and stem drawings. Use those drawings with the parts supplier's own dimensions. Where a listing leaves a measurement out, ask rather than assuming a part used in another build is interchangeable.
Decide what arrives assembled
A case supplied with crystal, bezel and seals installed involves different work from a bare case. A kit with a pre-fitted dial and hands also differs from a collection of loose components. List what you will actually need to do, then identify the appropriate tools and instructions for those tasks.
Plan a stop point
Stop if a component needs force, the stem release procedure is unclear or hands touch one another, the dial or crystal. Do not trim a stem from a guessed measurement. Obtain the component maker's procedure or use a professional for fitting and finishing.
Opening a watch can void its warranty and its water resistance. Water-resistance testing needs proper equipment. A completed assembly that ticks is not evidence of sealing or reliable operation.
Use the movement-size guide to understand the drawing labels and the comparison checker to identify published differences before buying.
Sources & further reading
- TMI NH35A specification and drawings · Checked 2026-10-25