Breitling Breitling - A7438710.BB50.435X Colt 44 Black / Calf

Colt 44 Black / Calf

REF. A7438710.BB50.435X

4/10

Uncommon

Case

MaterialStainless Steel

Diameter44 mm

Lug width22 mm

ShapeRound

CrystalSapphire

Case backClosed

Water resistance500 m

Dial

ColourBlack

IndexesArabic Numerals Hands: Stick

HandsStick

Movement

CaliberCaliber B74

Typequartz

Explore caliber→

In Context

At 44 mm it is a large watch — well above this catalogue’s 40 mm median, and enough to dominate a narrow wrist. At 14 mm it is a tall case, and it will catch on a cuff. The case back is closed, so the movement stays out of sight, and the sapphire crystal will resist everything short of deliberate abuse. 500 m is a professional diving rating, far past any demand a wrist is likely to make of it.

It is quartz, so it will hold time far more closely than any mechanical watch here, and asks for a battery every few years rather than a service.

A7438710.BB50.435X stands on its own in this catalogue — no other reference here shares its base number. It pairs a black dial with a stainless steel case.

Inside: Caliber Caliber B74

Explore this caliber →

The B74 is Breitling's SuperQuartz three-hander with date for the larger cases, built on the ETA Thermoline 955.652. It powers 40 watches in this library, 32 of them Colts. SuperQuartz is thermocompensated quartz: a thermistor measures the movement's temperature and the oscillator's rate is corrected digitally, which holds it to a few seconds a year and earns COSC chronometer certification. The B74 has hours, minutes, seconds and a date, 7 jewels and a 25.6 mm diameter, and it exists so the Colt 44 and the Colt Skyracer could carry a Breitling movement at a price below the automatics. In the library it sits under 32 [Colt](/brands/breitling/colt) references, the Colt 36, Colt 44 and the Breitlight-cased Colt Skyracer 45 of 2017, and 8 [Galactic 36](/brands/breitling/galactic) quartz references. The 36 mm case accounts for 19 references, the 44 mm for 12, the 41.1 mm for 6 and the 45 mm Skyracer for 3. The [Caliber 77](/calibers/breitling-caliber-77) is the equivalent SuperQuartz for the 33 mm Colt, the [B71](/calibers/breitling-caliber-b71) the Galactic's, and the [Caliber 17](/calibers/breitling-caliber-17) the automatic the Colt offered beside it.

39 other watches in the library run the Breitling Caliber B74.