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Tudor · Black Bay 58

Tudor Black Bay 58

Reference M7939A1A0NU-0002 · Dive · 39 mm

1020304050Ø 39 mmLug-to-lug 47.8 mm
Illustration drawn from the specifications: case to scale, colours and style approximate. Not a photo. Photos on the official page

Specifications

Reference
M7939A1A0NU-0002
Family
Black Bay 58
Category
Dive
Status
Current
Case material
Stainless steel
Case diameter
39 mm
Case thickness
11.7 mm Official
Lug-to-lug
47.8 mm Third-party
Lug width
20 mm Official
Water resistance
200 m
Bezel
Rotating, diver
Certifications
COSC, METAS
Calibre
MT5400-U Official
Power reserve
about 65 h

Official product page · retrieved October 14, 2026

Does it fit your wrist?

Enter your wrist circumference. The watch appears to scale on the flat top of the wrist.

1020304050Lug-to-lug 47.8 mmFlat top of the wrist 54.1 mm
Top view on a wrist, to scale
Flat top of the wrist 54.1 mmLug-to-lug 47.8 mmCase diameter 39 mm
Side view, across the wrist

Comfortable

Lug-to-lug 47.8 mm on a flat top of 54.1 mm: 88 % of the width.

Lug-to-lug is 75 to 95% of the flat top, the usual comfortable range.

Measurements and sources

Brands rarely publish thickness, lug width and lug-to-lug together. Each observation below is kept separate, with who gave it.

Case thickness

Value Type Source Date
11.7 mm Official Tudor October 14, 2026

Lug-to-lug

Value Type Source Date
47.8 mm Third-party Everest Bands Strap retailer size guide (December 2023), model-level figure listed for refs 79030, 79010, 79018, 79012. This reference is not listed; they are the earlier Black Bay 58 references, this one is the 2025 METAS version. October 14, 2026

Lug width

Lug width is the gap between the lugs, where the strap fits. It is not lug-to-lug.

Value Type Source Date
20 mm Official Tudor October 14, 2026

Calibre source

Official Tudor · retrieved October 14, 2026

Other versions in the same case

These references differ only by dial, bracelet or bezel colour. The brand gives them the same case dimensions, so the figures on this page apply to them too.

Other Black Bay 58 references

Watch Ø Thickness Lug-to-lug Calibre
Black Bay 58 925 M79010SG-0002 39 mm 12.7 mm 47.8 mm MT5400
Black Bay 58 Bronze M79012M-0001 39 mm 11.9 mm 47.8 mm MT5400
Black Bay 58 GMT M7939G1A0NRU-0001 39 mm 12.8 mm — MT5450-U

Other Tudor models

Watch Ø Thickness Lug-to-lug Calibre
Pelagos 39 M25407N-0001 39 mm 11.8–12.2 mm⚠ 47 mm MT5400
Black Bay M7941A1A0NU-0003 41 mm 12.7–13.6 mm⚠ 49–50 mm⚠ MT5602-U
Black Bay 54 M79000B-0001 37 mm 11.2 mm 45.8 mm MT5400
Black Bay Ceramic M7941A1ACNU-0001 41 mm 13.6 mm 49 mm MT5602-U
Pelagos 42 M25600TB-0001 42 mm 14.3 mm 50 mm MT5612
Pelagos FXD M25717N-0001 42 mm 12.8 mm 52 mm MT5602
Show 23 more
Watch Ø Thickness Lug-to-lug Calibre
Black Bay 68 M7943A1A0NU-0001 43 mm 13.6 mm — MT5601-U
Black Bay Bronze M79250BA-0001 43 mm 14.6 mm 52.7 mm MT5601
Pelagos Ultra M2543C1A7NU-0001 43 mm 14.5 mm — MT5612-U
Black Bay Pro M79470-0004 39 mm 14.6 mm 47.2 mm MT5652
Ranger M79950-0001 39 mm 12 mm 47 mm MT5402
Northflag M9140G1A0U-0001 40 mm 12.7 mm — MT5652-U
Black Bay GMT M79830RB-0001 41 mm 14.6 mm 50 mm MT5652
Ranger 36 M79930-0007 36 mm 11 mm — MT5400
Pelagos FXD GMT M2542GXX7NU-0002 42 mm 12.7 mm — MT5652-U
Black Bay Chrono M79360N-0014 41 mm 14.4 mm 50 mm MT5813
1926 39 M91550-0001 39 mm 9.2 mm — T601
1926 Luna M91560-0002 39 mm 10.1 mm — T607-9
Black Bay 39 M79660-0002 39 mm 12 mm 47.3 mm MT5602
Monarch M2639W1A0U-0001 39 mm 11.9 mm — MT5662-2U
Royal M2840D1A0-0001 40 mm 11.4 mm — MT5633
Pelagos FXD Chrono M25827KN-0001 43 mm 13.2 mm 52 mm MT5813
1926 M91650-0001 41 mm 9.3 mm — T601
Black Bay 41 M79680-0002 41 mm 12.2 mm 50.2 mm MT5601
1926 36 M91450-0001 36 mm 9.2 mm — T601
Black Bay 36 M79640-0002 36 mm 10.5 mm 43.9 mm MT5400
Royal 36 M2836C1A0-0102 36 mm 9.7 mm — MT5412
1926 28 M91350-0011 28 mm 9.1 mm — T201
Black Bay 31 M79600-0001 31 mm 9.5 mm 37.8 mm MT5201

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