Model & Reference

Case / Lug Width

Spring Bar Body Ø

Pivot (Tip) Ø

Shoulder Configuration

OEM / Engineering Notes

Black Bay 41 Diver (Ref. 79220 / 79230 / 7941A1A0)

41 mm case 22 mm lugs

1.80 mm

0.90 mm

Double-flanged

Standard modern blind-lug geometry. 1.80 mm body provides necessary clearance for Tudor OEM solid end links (SEL) and Tudor fabric pass-through straps.

Black Bay 58 (Ref. 79030N / 79010SG / 79012M)

39 mm case 20 mm lugs

1.80 mm

0.90 mm

Double-flanged

1.80 mm barrel prevents binding against the curved case wall when running custom leather or rubber; 2.0 mm aftermarket bars risk pinching or galling lug holes.

Black Bay 54 (Ref. 79000N)

37 mm case 20 mm lugs

1.80 mm

0.90 mm

Double-flanged

Shares 20 mm lug spacing with the BB58, but uses tighter case-to-hole clearance (1.80 mm body is mandatory to avoid leather collar rub against the bezel overhang).

Black Bay GMT (Ref. 79830RB / 79833MN)

41 mm case 22 mm lugs

1.80 mm

0.90 mm

Double-flanged

Deep case-crescent geometry. Factory steel bracelet SEL tolerances require precisely positioned 0.90 mm pivot seatings.

Black Bay Chrono (Ref. 79360N / 79363N)

41.5 mm case 22 mm lugs

1.80 mm

0.90 mm

Double-flanged

High-torsion case due to mass; requires high-tensile 316L stainless steel bars to prevent pivot deflection during bracelet twist.

Black Bay Pro (Ref. 79470)

39 mm case 20 mm lugs

1.80 mm

0.90 mm

Double-flanged

Identical spring bar spec to BB58; case is 14.6 mm thick, but lug-hole distance from the mid-case radius remains standardized to modern 20 mm Tudor bars.

Pelagos 42 (Ref. 25600TB / 25600TN / 25610TNL)

42 mm case 22 mm lugs

1.80 mm

0.90 mm

Double-flanged

Titanium case; requires exact 0.90 mm pivot fitment to avoid mechanical wear/ovaling ("egg-shaping") on the softer Grade 2 titanium lug drillings.

Pelagos 39 (Ref. 25407N)

39 mm case 21 mm lugs

1.80 mm

0.90 mm

Double-flanged

Odd-dimension lug stance (21 mm). Bars are non-interchangeable with 20 mm BB58 or 22 mm Pelagos 42.

Pelagos FXD / Chrono FXD (Ref. 25707B / 25807KN)

42 / 43 mm case 22 mm lugs

N/A (Fixed Bars)

N/A

Fixed integral titanium loop

No spring bars. Machined directly out of the titanium case block. Requires pass-through (NATO/single-piece hook-and-loop) straps only.

Ranger (Modern) (Ref. 79950)

39 mm case 20 mm lugs

1.80 mm

0.90 mm

Double-flanged

Directly shares spring bar dimensions with BB58 (20 mm x 1.80 mm x 0.90 mm). Factory clasp uses modern T-fit system.

Black Bay 36 (First Gen) (Ref. 79500)

36 mm case 19 mm lugs

1.80 mm

0.90 mm

Double-flanged

19 mm lug width. Standard ETA/Sellita-based era; double-flanged bars required for blind lugs.

Black Bay 36 (In-House / 5-Link) (Ref. 79640)

36 mm case 19 mm lugs

1.80 mm

0.90 mm

Double-flanged

19 mm lug width. Five-link bracelet end links use tight interior tolerances calibrated specifically for 1.80 mm bodies.

Black Bay 39 (In-House) (Ref. 79660)

39 mm case 21 mm lugs

1.80 mm

0.90 mm

Double-flanged

21 mm lug stance. Must use dedicated 21 mm bars; forcing 22 mm bars will cause flange bind, while 20 mm bars lack critical case engagement.

Model & Reference

Case / Lug Width

Spring Bar Body Ø

Pivot (Tip) Ø

Shoulder Configuration

OEM / Engineering Notes

Submariner "Big Crown" (Ref. 7924 / 7922)

37.5 mm case 20 mm lugs

2.00 mm

1.15–1.20 mm

Shoulderless

Uses drilled-lug diver standard (equivalent to Rolex OEM Ref. 23-9291 / 23-9300). Never use flanged bars; must use shoulderless pins seated through outer lug holes.

Submariner "Rose" / "Shield" (Ref. 7928 / 7016/0)

39.5 mm case 20 mm lugs

2.00 mm

1.15–1.20 mm

Shoulderless

Heavy-gauge 2.00 mm body. Pivot tips must fully penetrate into drilled outer lug holes to prevent tip sheer under load.

Submariner "Snowflake" (Ref. 9411/0 / 9401/0)

39.5 mm case 20 mm lugs

2.00 mm

1.15–1.20 mm

Shoulderless

Built for folded-link (ref. 9315) and solid-link (ref. 93150) Oyster bracelets with 380/580 end links. 1.20 mm pivot diameter matches drilled lug hole specs.

Submariner Date (Ref. 79090 / 76100)

39.5 mm case 20 mm lugs

2.00 mm

1.15–1.20 mm

Shoulderless

Drilled lug holes. When fitting thicker leather or pass-through straps, a 1.78 mm body with 1.20 mm pivots can be substituted if clearance to the case edge is tight.

Submariner Date (Late/Sapphire) (Ref. 79190)

39.5 mm case 20 mm lugs

2.00 mm

1.15–1.20 mm (Early) 0.90 mm (Late)

Shoulderless (Early) Double-flanged (Late)

Transition reference: Early models feature drilled through-holes (2.00 mm body / 1.20 mm pivot shoulderless); late production without lug holes shifts to double-flanged bars with 0.90 mm pivots.

"Monte Carlo" Chronograph (Ref. 7149/0 / 7159/0 / 7169/0)

40 mm case 20 mm lugs

2.00 mm

1.15–1.20 mm

Shoulderless

Drilled lug Oyster cases. Thick chronograph case requires 2.00 mm thick-body spring bars to prevent flex against OEM folded-link ref. 7836 bracelets.

"Big Block" Chronograph (Ref. 94200 / 79160 / 79170 / 79180)

40 mm case 20 mm lugs

2.00 mm

1.15–1.20 mm

Shoulderless

Deep case flank with drilled lugs. Requires 20 mm x 2.00 mm shoulderless bars. 0.80/0.90 mm modern pivots must never be used here, as lug hole clearance will cause severe wear.

Prince Date Chronograph (Ref. 79260 / 79270 / 79280)

40 mm case 20 mm lugs

1.80–2.00 mm

1.15–1.20 mm (Drilled) 0.90 mm (No-Holes)

Shoulderless (Early) Double-flanged (Late)

Early variants with drilled lugs use 1.20 mm shoulderless tips; transitional no-holes cases require 1.80 mm double-flanged bars with 0.90 mm tips.

Oyster Prince "Ranger" / Date (Ref. 9050 / 7965 / 7995)

34 mm case 19 mm lugs

1.78 mm

0.90–1.00 mm

Shoulderless (Drilled)

19 mm vintage lug width. Smaller drill holes than the Submariners; requires 19 mm vintage Oyster bars (equivalent to Rolex Ref. 23-9290 / 23-9250 style).