The LUM-TEC Combat B70 Automatic represents a significant evolution in the brand’s well-regarded Combat series, building upon a legacy that stretches back to 2007. This limited-edition timepiece, crafted by the Ohio-based American watchmaker, offers a compelling blend of robust engineering, distinctive aesthetics, and a commitment to meticulous regulation, all while maintaining the accessible price point for which LUM-TEC has become known. Revisiting the Combat line, which was first reviewed on aBlogtoWatch.com with the Combat B7 model in 2010, provides a valuable lens through which to observe the brand’s sustained dedication to refining its core design principles and enhancing the overall quality and sportiness of its offerings. The foundational design of the Combat B-series draws inspiration from the classic German Flieger watches of the mid-20th century, a timeless aesthetic that continues to resonate with consumers seeking military-inspired timepieces with a unique character. LUM-TEC’s consistent introduction of new models within this series underscores its enduring appeal and the brand’s ability to innovate while respecting its heritage.

A Legacy of American Watchmaking
LUM-TEC’s journey began in 2007, the same year aBlogtoWatch.com was founded, positioning the brand as a contemporary in the burgeoning online watch enthusiast landscape. From its inception, the Combat series has been a cornerstone of LUM-TEC’s identity. The brand distinguishes itself not merely as a designer and marketer of watches, but as a hands-on machining and assembly firm with a deep understanding of horological engineering. This distinction is crucial; LUM-TEC actively participates in the manufacturing and assembly processes, a contrast to many brands that outsource these critical stages. This hands-on approach, coupled with a focus on in-house movement regulation, allows LUM-TEC to imbue its timepieces with a level of precision and durability that belies their accessible price point. The Combat B70 Automatic, therefore, is not just a watch; it’s a testament to American ingenuity and a commitment to producing high-quality, functional instruments.
Design Evolution: The Allure of the B70’s Color Palette
While the broad strokes of the Combat B-series design remain consistent, the LUM-TEC Combat B70 Automatic introduces a captivating departure from the more traditional black and white or tan color schemes often seen in pilot-style watches. The B70 Automatic boldly embraces a striking blue and white dial, punctuated by vibrant red accents on the hands. This color combination, evocative of national flags and often associated with themes of patriotism and clarity, provides a fresh and distinctive aesthetic for a familiar design language. The choice of blue, a perennially popular color in watchmaking, is expertly balanced with the inherent legibility and sporty appeal of red. This unique chromatic pairing creates a visually engaging experience that, while perhaps not universally appealing, offers a refreshing alternative for those seeking a timepiece with personality and a modern twist on classic pilot watch aesthetics.

The dial itself is a showcase of LUM-TEC’s proprietary "MDV" (Maximum Darkness Visibility) SuperLumiNova application, ensuring exceptional luminosity in low-light conditions. The lume application is described as consistently good and even, a critical feature for any tool watch. The dial layout thoughtfully balances utilitarianism with a touch of refined character. While the larger Arabic numerals at the 12, 3, 6, and 9 o’clock positions enhance legibility, they also serve to fill the dial space, preventing an overly stark or basic appearance. The deliberate decision to keep additional text and extraneous elements to a minimum reinforces the B70’s identity as a serious, purpose-built tool timepiece, prioritizing function and clarity above all else.
Engineering for Durability and Performance
The LUM-TEC Combat B70 Automatic is engineered with a primary focus on resilience and performance, characteristics that are paramount for a tool watch. The case is constructed from a specially forged and strengthened steel alloy, a material chosen for its superior toughness and scratch resistance compared to standard 316L stainless steel. This hardened steel is finished with a meticulous bead-blasted treatment, which not only imparts a refined, matte aesthetic but also offers enhanced fingerprint resistance, maintaining the watch’s pristine appearance through regular use.

Beyond the robust case material, LUM-TEC incorporates a series of high-performance seals, gaskets, and shock absorption features to ensure the watch’s imperviousness to water and environmental elements. The case is rated for 200 meters of water resistance, making it suitable for a wide range of aquatic activities. Protecting the vibrant dial is a domed sapphire crystal, renowned for its scratch resistance and clarity. The crystal’s anti-reflective coating further enhances legibility by minimizing glare, a crucial feature for a watch designed for use in varying light conditions. The thoughtful execution of the crystal’s shape and coating is a detail that LUM-TEC excels at, often drawing favorable comparisons to much higher-priced luxury timepieces.
Case Dimensions and Wearability
The LUM-TEC Combat B70 Automatic measures 43mm in width, with a thickness of 13.6mm and a lug-to-lug distance of 51.5mm. While these dimensions contribute to the watch’s substantial presence and robust feel, they may present a challenge for individuals with smaller wrists. The included NATO-style strap, while of high quality and featuring attractive hardware, naturally adds to the watch’s perceived height and width on the wrist. For those with more slender wrists who are drawn to the B70’s design, exploring alternative, thinner 22mm strap materials could significantly improve wearability and allow the watch to drape more elegantly. The adaptability of strap choices remains a key aspect of personalizing any timepiece, and the Combat B70 is no exception.

The Heart of the Machine: Movement and Regulation
A significant aspect of LUM-TEC’s value proposition lies in its meticulous approach to movement regulation. While the brand utilizes sourced movements, each one undergoes rigorous in-house regulation, typically performed in six positions, to optimize chronometric performance. The Combat B70 Automatic is powered by a specially regulated Japanese Miyota 9015 caliber, specifically the caliber 9039, which is the no-date variant of the widely respected 9015. This 4Hz automatic movement offers a power reserve of approximately 40 hours and has established a reputation for reliability and accuracy.
While the Miyota 9015 is known for its robust performance, some users may notice the rotor’s spinning sound. However, the substantial construction of the B70’s case effectively dampens much of this potential noise, contributing to a more refined user experience. The choice of the Miyota 9015 for the Combat B70 Automatic is seen as an appropriate and value-driven decision, providing dependable automatic functionality within a well-constructed and aesthetically pleasing timepiece. The inclusion of a display caseback, offering a view of the regulated movement, is a welcome feature that allows enthusiasts to appreciate the inner workings of this American-assembled watch.

Limited Edition Appeal and Value Proposition
The LUM-TEC Combat B70 Automatic is a limited edition, restricted to just 500 pieces worldwide. This exclusivity adds to its desirability for collectors and enthusiasts. The watch is offered with a choice of a blue or gray NATO-style strap, further enhancing its versatility. The retail price of $1,095 USD positions the Combat B70 Automatic as an exceptional value within the contemporary watch market. It offers a combination of unique design, robust construction, precise regulation, and American assembly that is difficult to find at this price point.
For those who appreciate the classic pilot watch aesthetic but desire a more conventional color scheme, LUM-TEC also offers the Combat B69. This model shares the identical case and specifications of the B70 but features a more traditional black dial with cream or tan accents. This availability of both a bold, modern colorway and a classic, understated option demonstrates LUM-TEC’s commitment to catering to a diverse range of preferences while consistently delivering on its core values of quality, durability, and value. The Combat B70 Automatic stands as a compelling example of LUM-TEC’s dedication to producing functional, attractive, and enduring timepieces that honor their heritage while embracing contemporary innovation.