Mars

There's a machine sitting in the Technik Museum Sinsheim that stops people mid-stride: a boxy, white-painted motorcycle with a pressed-steel spine running from headstock to rear axle, a flat-twin engine slung underneath like an afterthought, and the general bearing of something designed by an engineer who had never been told what a motorcycle was supposed to look like. That's the White Mars, and it's the reason anyone outside Germany has heard of this marque at all. But the company behind it had already been in business for half a century by the time that bike rolled out of the Nuremberg works, and it took a stranger route to get there than most of its contemporaries.

Origins in Nuremberg

Mars was not born as a motorcycle company. Paul Reissmann founded the concern in Nuremberg in 1873 to make cast-iron stoves, and for the next three decades the firm's output read like the inventory of a general engineering workshop rather than a vehicle manufacturer: hand-, belt-, and engine-driven sirens, grinding machines, and bicycles. Bicycles turned out to be the important item on that list. Nuremberg and its surrounding region were thick with cycle and engineering firms in this period, and Mars had the tooling, the workforce, and the mechanical fluency to follow the obvious next step. The company even built automobiles briefly, between 1906 and 1908, before setting that ambition aside. Motorcycles proved the more durable bet — production began in 1903, with proprietary engines from Fafnir and the Swiss maker Zedel bolted into Mars-built cycle frames, the standard formula for small European manufacturers entering the powered-two-wheeler business at the turn of the century.

The Machine That Made the Name

What Mars is actually remembered for arrived roughly two decades later, and it looked like nothing else on German roads. Designed by engineer Claus Franzenburg, the model that became known as the Weiße Mars — the White Mars — was built around a box-section steel frame that did far more work than a conventional tube frame: it ran from the steering head back to the rear wheel and enclosed both the transmission and the drive chain inside its pressed-steel structure. The engine, a flat-twin of Franzenburg's own design, hung beneath this spine in a subframe rather than sitting inside a conventional cradle. It was manufactured for Mars by Maybach, the Friedrichshafen firm better known for aircraft and airship engines, and displaced 956cc, the figure documented by the Technik Museum Sinsheim, though some older sources still cite 986cc.

The result looked like an engineering department's fever dream of what a shaft-driven, weather-protected, mechanically serious motorcycle could be, at a time when most of the competition was still assembling bicycles with engines strapped on. The layout was designed in 1920, and the resulting A 20 model was produced from that year through 1925 — though production was not continuous, as we'll get to. And despite the name that stuck to the whole family, the White Mars was not only white; the factory offered it in red and green as well, which makes the nickname more a matter of reputation than of paint code.

The Weiße Mars Family

The White Mars was never a single model but a lineage. It began with the A 20 and its trailing-link front fork, and continued through the A 23, the MA 25, the MA 27, and eventually the MA 1000 Sport of 1928, which switched to a girder fork and added a recirculating lubrication system to the flat-twin engine — a genuine refinement at a time when total-loss oiling was still common on smaller machines. Across this run, the fundamental architecture that Franzenburg had laid down held constant: the load-bearing pressed-steel spine, the underslung engine, the shaft final drive that spared owners the maintenance headaches of a chain running through Bavarian weather. It was a design built to be modern, and for a few years in the early 1920s, it genuinely was.

That run was interrupted almost as soon as it began. The hyperinflation that tore through the German economy in 1923 and 1924 hit Mars hard enough that production of the White Mars ceased entirely during the worst of it, not resuming until 1926 — a gap that sits inside the official "1920 to 1925" production window for the A 20 and is a reminder that continuous manufacture and continuous solvency were not the same thing for a company like this one in Weimar Germany.

Racing

Mars fielded factory machines in competition during the early 1920s, and the marque's name does turn up in accounts of Bavarian regional racing from the period. The specifics of individual results from this era are thin and inconsistently sourced, and readers should treat any particular finishing positions attributed to named Mars riders in 1921 with caution — the record is not solid enough to state them as settled history. Whether Mars machines were also entered in races in later years is likewise not something the surviving record pins down with any confidence, though the general pattern of small German manufacturers using racing to prove out frame and engine designs to a buying public that paid attention to who won on Sunday is well established.

Ownership Changes and the MA Years

The inflation crisis that halted White Mars production also changed who owned the company. Brothers Johann and Karl Müller, who had been working inside Mars as managers and designers, took over the plant itself when the crisis passed — but not the Mars brand name. That detail matters more than it might seem: it meant the Müllers had to rebuild market identity almost from scratch. They resumed production in 1925 under the new brand name MA, and by 1928 the MA-badged machines were using MAG engines from the Swiss manufacturer Motosacoche, followed later by a rotating cast of British proprietary powerplants — Villiers, JAP, and Sturmey-Archer among them. This was the standard survival strategy for a mid-tier European manufacturer in the interwar years: buy in whatever reliable engine could be had at the right price, rather than carry the cost of developing your own.

The Second World War brought the next interruption, as it did to nearly every German motorcycle maker still standing, and production resumed again afterward — this time reunited, eventually, with the Mars name itself.

Postwar Revival and the Stella

The company's second act came in 1950, when Rudi Albert — previously chief designer at Allright and at Phänomen — joined the firm and set to work on a new model called the Stella. It became one of the more successful German motorcycles of its period, a lightweight machine built around proprietary two-stroke engines from Fichtel & Sachs, offered in 147cc, 174cc, and 198cc displacements to suit different licensing categories and rider budgets. This was exactly the market that mattered in early-1950s West Germany: affordable, practical transportation for a population rebuilding itself, not the shaft-drive engineering statement the White Mars had been thirty years earlier. The Stella sold well enough to justify the postwar revival of the Mars name, even if it never carried the same mystique.

It was, in the end, the last real chapter. The company's final model was a small 48cc machine called the Monza, and when Mars ceased production for good, the rights to continue building the Monza Super Sport passed to Gritzner-Kayser AG, which kept the model alive under its own Gritzner brand into the 1970s. Manufacturing at the Müller factory itself stopped in 1958, closing out a Mars production history that had run, with interruptions for war and economic collapse, for more than half a century.

What Survives

Mars as an independent motorcycle manufacturer is gone, and has been for well over sixty years — the brand ended with the 1958 handover to Gritzner, and there has been no meaningful revival since. What remains is the reputation of one specific machine. The White Mars occupies a strange but secure place in the history of German motorcycle engineering: a genuinely unconventional solution to frame and drivetrain design, built by a company that spent most of its existence making stoves and bicycles rather than pursuing motorcycling glory for its own sake. Surviving examples are rare enough that seeing one is an event rather than a routine at vintage shows, and the Technik Museum Sinsheim's example remains one of the most complete, well-documented specimens in public hands — a useful corrective to the vaguer claims that circulate about the model, since the museum's own research is what settles the persistent 956cc-versus-986cc question in the engine's favor.

For collectors, the appeal of Mars is really the appeal of two distinct machines separated by three decades: the White Mars, valued today as an engineering curiosity from the golden age of German motorcycle experimentation, and the Stella, valued more modestly as a well-built piece of postwar transportation history. Between them sits a company that never quite decided what kind of motorcycle maker it wanted to be — which, in hindsight, is exactly what makes its story worth telling.