Bulova 1133.10 & 1133.50: Modern Quartz Movements with Swiss Precision

The Bulova 1133.10 and 1133.50 are modern Swiss-made quartz movements, used in a wide range of Bulova’s contemporary wristwatches. These movements reflect Bulova’s shift toward high-accuracy quartz technology, offering precise timekeeping, slim profiles, and reliability suitable for everyday wear. Though not as historically iconic as the tuning fork-powered Accutron or the early mechanical calibers, the 1133-series movements play an essential role in Bulova’s modern lineup.

Movement Family and Overview

These calibers are part of Bulova’s 11xx quartz movement family, often produced by ETA or other high-quality Swiss suppliers under private labeling agreements. The 1133 series movements are typically used in analog watches, including men’s dress watches, casual sport models, and fashion-forward designs.

Shared Specifications for 1133.10 and 1133.50:

• Movement type: Quartz (battery-powered)

• Functions: Hours, minutes, center seconds, and date display

• Accuracy: Typically ±15 seconds per month

• Battery type: Most commonly 371 (Silver Oxide)

• Jewels: Usually 1–3 synthetic jewels (depending on model)

• Height: Very slim profile, ideal for thin watch cases

• Power reserve: Around 2–3 years per battery

These movements offer hassle-free reliability, a long service interval, and excellent resistance to shock, magnetism, and temperature changes.

Differences Between 1133.10 and 1133.50

While both movements are functionally similar, the 1133.10 and 1133.50 may differ slightly in case compatibility or internal architecture—typically in areas like:

• Dial feet position: Adjusted to accommodate different case and dial designs

• Hand sizes: Slight differences in the hole diameters for hour/minute/second hands

• Calendar mechanism: Different positioning or mounting for the date wheel

These differences are usually invisible to the end user but matter for watchmakers and parts replacement. Both versions are interchangeable only with care—confirming dial and hand fitment is essential when swapping movements.

Practical Features

The 1133-series movements are designed for ease of use and long-term performance. Key functional highlights include:

• Center seconds hand with quartz tick motion

• Date window (quick-set function via crown)

• End-of-life indicator (EOL) on some versions—second hand begins ticking every 4 seconds when battery is low

• Anti-magnetic shielding

• Battery hatch or removable battery bridge for quick battery changes in certain models

These features make the movements excellent choices for reliable modern watches with little to no maintenance required between battery replacements.

Applications in Bulova Watches

Movements like the 1133.10 and 1133.50 are found in a wide range of Bulova timepieces, such as:

• Slim dress watches

• Minimalist casual watches

• Day-date office timepieces

• Entry-level Swiss quartz models

These are often cased in stainless steel, gold-tone plated, or two-tone designs, with simple dials and classic markers. Many watches featuring these movements appeal to consumers who prefer accurate, low-maintenance quartz watches with a refined aesthetic.

Maintenance and Battery Replacement

The 1133.10 and 1133.50 movements require minimal care aside from occasional battery replacement, which should be performed every 2–3 years depending on usage.

Tips:

• Use only high-quality Silver Oxide batteries (Renata or equivalent)

• Avoid leaving a dead battery inside the case to prevent leakage

• Handle circuit and coils carefully during service—static or magnetism may cause damage

Final Thoughts

The Bulova 1133.10 and 1133.50 movements are dependable, ultra-thin quartz engines that power many of the brand’s modern timepieces. Though not celebrated for horological complexity, they are precise, efficient, and convenient—perfect for users who want a watch they can trust day in and day out. For anyone seeking Swiss reliability in a quartz format, these movements remain a sound choice.