Description
Few custom pistolsmiths left a mark on classic European service pistols quite like John Martz. Known for his meticulous craftsmanship and mechanical creativity, Martz spent decades refining and re-imagining iconic handgun designs, most notably the Walther P38. This remarkable prototype set represents one of the most intriguing expressions of that work: a pair of experimental conversions that explore the P38 platform in .45 ACP and .38 Super.
Presented in a beautifully fitted hardwood presentation case lined in vivid blue fabric, the set includes the complete Walther P38 pistol configured for .45 ACP, along with a dedicated Martz-marked .38 Super conversion top end. A brass plaque inside the case identifies the set as a Prototype P38 in .45 ACP / .38 Super calibers, dated September 20, 1995, underscoring its experimental nature and its place in Martz’s late-career development work.
At first glance, the pistol retains the unmistakable silhouette of the classic Walther P38. Look closer, however, and the transformation becomes clear. Martz engineered a substantially extended barrel and slide assembly, giving the pistol a distinctive long-slide profile. This modification was not simply aesthetic; it provided the necessary mass and geometry to manage the more powerful cartridges while maintaining the P38’s unique locking system.
The craftsmanship throughout is unmistakably Martz. The metalwork exhibits a deep, even satin finish that highlights the precision of the machining. Controls and mechanical interfaces appear carefully hand-fitted, and the pistol retains the elegant balance that made the original Walther design so successful. Warm checkered walnut grips complement the refined metal finish, adding a traditional touch to an otherwise highly experimental firearm.
Equally fascinating is the interchangeable .38 Super conversion assembly, marked in Martz’s distinctive script. This component reflects Martz’s ongoing exploration of adapting the P38 platform to cartridges far beyond its original 9mm configuration. The inclusion of both calibers within a single prototype presentation set offers a rare glimpse into the developmental process of a master pistolsmith testing the limits of the design.
The fitted case itself is a work of craftsmanship. Custom-cut recesses securely hold the pistol, conversion assembly, and magazine, while brass nameplates identify the prototype and credit the case maker, Robert Edwards. The presentation evokes the feel of a fine custom tool or scientific instrument. appropriate for a firearm that represents experimentation and engineering ingenuity.
For collectors of custom pistols, Martz conversions occupy a special niche. They bridge the gap between classic European service arms and the innovative spirit of American custom gunsmithing. Examples rarely surface, and prototype configurations such as this dual-caliber P38 set are exceptionally scarce.
This set stands as both a technical curiosity and a tribute to John Martz’s relentless pursuit of perfection. It captures a moment when a legendary design met the imagination of a master craftsman, resulting in a firearm that is equal parts historical homage and mechanical exploration.
In any serious collection of custom or experimental pistols, the John Martz Walther P38 Prototype Set in .45 ACP and .38 Super would represent a centerpiece: a tangible reminder that even the most established designs can still inspire bold innovation.
