A production unit of the Field 40 was received from Arc & Tide, independently measured under Measurement Protocol v1.0, and retained in the MeasuredWatch Physical Reference Archive.
This unit can be remeasured if a specification is disputed, retested under future protocol versions, and used to document long-term performance.
Caliper fields: three measurements, median reported, resolution 0.01 mm. “New” fields are not published by the brand and originate here.
| Specification | Published | Measured | Delta |
|---|---|---|---|
| Diameter | 40.0 mm | 39.94 mm | −0.06 |
| Thickness | 11.5 mm | 11.62 mm | +0.12 |
| Lug-to-lug | 47.0 mm | 47.08 mm | +0.08 |
| Lug width | 20 mm | 20.01 mm | ✓ |
| Crown diameter | Not published | 6.21 mm | NEW |
| Weight, head only | Not published | 61.8 g | NEW |
| Weight, as shipped | Not published | 76.4 g | NEW |
| Bracelet taper | Not published | 20 → 18 mm | NEW |
| Clasp width | Not published | 18.02 mm | NEW |
Verification means independent measurement and bench-testing of one physical production unit against published specifications under Measurement Protocol v1.0. It is not an authenticity certification or a quality-control audit of the full production run.