Side by side

Differs

Breitling Premier B21 Chronograph Tourbillon 42 Willy BreitlingLB2120171C1

Breitling Premier B21 Chronograph Tourbillon 42 Willy Breitling

Breitling Top Time B21 Shelby CobraSB21251A1C1

Breitling Top Time B21 Shelby Cobra

General

Status: In production; In production
Introduced (differs): 2022; 2023
Retail price (differs): US$85,300; US$51,500

Case

Shape: Round; Round
Diameter: 42 mm; 42 mm
Thickness (differs): 15.25 mm; 15.4 mm
Lug width (differs): 22 mm; 22.05 mm
Material (differs): 950 platinum; Ceramic
Bezel: Fixed; Fixed
Caseback (differs): Display (sapphire); Screw-down
Crystal (differs): Sapphire, Domed, Anti-reflective on both sides; Sapphire
Crown: Push-pull; Push-pull
Water resistance: 100 m; 100 m

Movement

Calibre: Breitling B21 (Manufacture La Joux-Perret); Breitling B21 (Manufacture La Joux-Perret)
Type: Automatic; Automatic
Origin: In-house; In-house
Power reserve: 55 h; 55 h
Frequency: 28,800 vph (4 Hz); 28,800 vph (4 Hz)
Jewels: 30; 30
Functions: 1/4th second, 60 minutes; 1/4th second, 60 minutes
Complications: Chronograph
Small seconds
Tourbillon; Chronograph
Small seconds
Tourbillon

Dial

Colour: Blue; Blue
Pattern (differs): Sunburst; Matte
Indices (differs): Arabic numerals; Mixed
Hands (differs): Syringe; Baton

Bracelet

Type: Leather strap; Leather strap
Name (differs): Black alligator leather strap; Blue racing-themed calfskin leather strap
Clasp (differs): Folding clasp, 18k white gold; Folding clasp, Titanium
Strap colour (differs): Black; Blue