Source note
Case thickness (12mm) and lug-to-lug (47.5mm) from a Tudor sizing-guide roundup (Everest Bands), single-source; the lug-to-lug figure was labeled just "Height" in that source's spec table, reasonably interpreted as lug-to-lug but not explicitly confirmed as such.
Spec backfill (2026-08-06): Tudor official + Chrono24. Unresolved: bezel_type, dial_color ("Anthracite" plausible but not re-confirmed this pass), strap_type/material, clasp_type, year_introduced, complications.
Spec backfill (2026-08-08, round 7): dial_color and strap_type re-confirmed via real sources rather than trusted from the variation name alone, per the task's caution -- REEDS Jewelers' direct listing ("Black Anthracite Dial Stainless Steel Watch"), Watchfinder's listing title ("Tudor Black Bay 39 - Anthracite Dial & Bracelet Strap"), Ben Bridge ("39mm steel case with a steel strap and anthracite dial"), and King Jewelers ("Anthracite Dial") all independently agree. No conflict with the already-stored MT5602 caliber/100m WR/case dims -- those are left untouched (already non-NULL). Note on this row already flags that case_thickness_mm/lug_to_lug_mm were single-sourced from an Everest Bands roundup -- not re-verified this pass, out of scope (both already non-NULL). Unresolved: bezel_type, strap_material, clasp_type (T-fit clasp likely, per the 41mm sibling id=72's sourcing below, but not independently confirmed for this 39mm ref this pass), year_introduced, complications.