Bulova 16AC: A Larger Manual-Wind Workhorse from the Mid-Century Era

The Bulova 16AC is a robust and relatively large manual-wind movement designed during the mid-20th century, likely in the late 1940s or early 1950s. It followed in the footsteps of the earlier 16AB, offering enhanced features and serving as a reliable engine for Bulova’s broader post-war watch collections. Known for its durability, serviceability, and larger case compatibility, the 16AC was used in practical timepieces aimed at men with active lifestyles.

Technical Specifications

The “16” prefix refers to the movement’s ligne size—16 ligne, which equals approximately 36.1 mm in diameter. This places the 16AC among Bulova’s largest mechanical calibers, perfect for watches with bold designs, open dials, and more wrist presence than the company’s smaller 10–12 ligne counterparts.

Key Features:

• Type: Manual-wind mechanical

• Diameter: ~16 ligne (~36.1 mm)

• Height: Moderate profile; fits comfortably in larger cases

• Jewels: Typically 15 or 17, depending on model and year

• Functions: Hours, minutes, and sub-seconds at 6 o’clock

• Power Reserve: ~40–42 hours

• Beat Rate: 18,000 bph (vibrations per hour)

• Shock Protection: Basic in early versions; upgraded to Incabloc or similar in later ones

• Date Function: None in the base 16AC

This movement is mechanically simple, which was ideal for watches worn in daily life, military environments, or physically demanding professions.

Design and Application

The 16AC was used in a variety of post-war Bulova wristwatches, especially those marketed to men who wanted a larger, more legible watch for everyday use. Common styles included:

• Military-inspired field watches

• Water-resistant sport watches

• Functional dress watches with bold Arabic numerals

Design elements typical of 16AC-powered watches:

• Large, round stainless steel or chrome-plated cases

• Matte black or silver dials with clear numerals

• Lumed hands and indices for visibility

• Sub-second dial at 6 o’clock

• Leather or canvas straps for comfort and practicality

These watches were often advertised as rugged yet refined—ideal for work or casual settings.

Reliability and Service

The Bulova 16AC is regarded by watchmakers as a well-built and reliable movement. Thanks to its larger size, its internal components are spaciously laid out, making disassembly and service straightforward.

Watchmaker Notes:

• The wide bridges and gear train are easy to clean and lubricate.

• Sub-seconds drive requires alignment during reassembly.

• Crown and stem wear may occur due to years of manual winding—easily replaceable.

• Periodic lubrication (every 4–6 years) helps maintain timing accuracy.

Parts for the 16AC can still be found in vintage watchmaker inventories or from donor movements, though less commonly than smaller Bulova calibers.

Collectibility and Appeal

While not a high-end collector's caliber, the Bulova 16AC appeals to enthusiasts who appreciate large vintage watches, manual control, and the charm of pre-quartz mechanical engineering. It remains affordable, and its larger size makes it more appealing to modern wearers compared to the smaller calibers of the 1940s.

Why collectors value the 16AC:

• Manual-wind movement with satisfying tactile feedback

• Large diameter suits today’s style preferences

• Easy to service and maintain

• Vintage charm with excellent legibility

• Great entry point for vintage mechanical watch collecting

Final Thoughts

The Bulova 16AC is a solid example of functional mid-century watchmaking. It embodies the post-war spirit of utility, resilience, and everyday elegance. With its reliable manual-wind performance, robust size, and mechanical simplicity, the 16AC continues to tick strong decades later.

For collectors, restorers, and vintage watch lovers, the Bulova 16AC remains a dependable choice—perfect for those seeking heritage and practicality in a classic wristwatch.