Tudor Black Bay 58 79030N

39mm Black Bay 58 on a fabric strap. Under HK$25,000, COSC-certified, and genuinely wearable every day.

A 2023 Black Bay 58 in excellent condition with box and card, supplied on the Tudor woven fabric strap. This is where we send buyers who want a real Swiss mechanical dive watch without a five-figure commitment: 39mm, 200m water resistance, an in-house COSC-certified movement with a 70-hour reserve, and a 5-year manufacturer warranty that still has time remaining. Nothing about it is a compromise except the price.

Specification

Condition report

Case: excellent with only faint hairlines on the polished lug flanks; brushed surfaces retain factory finish.

Bezel: black aluminium insert with sharp printing and gilt accents; 120-click action firm and precise.

Crystal: original domed sapphire, unmarked.

Dial and hands: gilt-accented black dial flawless, applied lume plots even and fully intact.

Strap: original Tudor woven fabric strap with light edge wear; steel buckle unmarked.

Movement: calibre MT5402 running +3 seconds per day, 70-hour reserve confirmed.

Authentication

Caseback opened and calibre MT5402 confirmed with correct Tudor finishing, silicon hairspring, and matching serial. Card cross-referenced with case serial and purchase date. Dial printing and lume plot geometry examined at 40x. Bezel insert printing and click mechanism verified against specification. Remaining manufacturer warranty confirmed as transferable.

Pricing rationale

Retail is HK$29,800. Completed sales for full-set 79030N examples in Excellent condition ran HK$22,500–HK$26,500 over ninety days. We are at HK$24,500, mid-band, with the remaining transferable Tudor manufacturer warranty supporting the price. To be straightforward: Tudor is produced in volume and will not appreciate. Expect to lose some value if you resell in the short term — this is a watch bought to wear, and we would rather say so than imply otherwise.

Service history

No service required — within manufacturer service interval. Pressure tested to 20 bar and regulated at our bench.

Authentication ref. MH-AUTH-24071 — Marcus Leung, WOSTEP-trained (Head Watchmaker) (2026-07-16)

Comparable market range: HK$22,500 – 26,500 (90-day completed sales)

Originality: Original, Original, Original, Original, Original, Original.

Backed by a 24-month written mechanical warranty, 14-day unworn returns and free insured worldwide shipping from our Hong Kong studio.