Neptun sailboats: one German yard, and four unrelated namesakes
The name "Neptun" — and its English-language cousin "Neptune" — attaches to five entirely separate boatbuilding stories that share only their spelling. Chief among them is Neptun-Yachten, a small German yard that grew out of one machine locksmith's cellar experiments with fiberglass resin into a multi-generation family business near Bielefeld, building hand-laid GRP cruisers from the mid-1960s onward. Alongside it, a Swedish one-design skerry cruiser, a California production builder, a French dinghy-class racer, and a British catalog design have all, at one point or another, answered to some version of the same name — distinct histories, distinct designers, and in at least one case, an outright data mix-up in the historical record.
Origins and ownership
Neptun-Yachten's founding story starts with a hobbyist's experiment: in 1964, machine locksmith Rudolf Eberhardt began working in his cellar with fiberglass resin, then still an unfamiliar material, and, together with colleague Wolfgang Tiersch, built a plaster mold for a dinghy cruiser. That mold became the yard's first boat and its founding moment. The two-man operation moved to a farm barn in Bielefeld, where it developed the Neptun 14, 15, and the especially successful 17, then relocated again in 1967 to Lage with a staff of ten, building the first Neptun 210 and 212 there. (A "210" elsewhere in this site's catalog describes the unrelated American International 210, designed by C. Raymond Hunt in 1946 — a cataloging mix-up; the genuine German Neptun 210 dates to this 1967 Lage-era production, and Hunt had no hand in any Neptun.)
Success bred expansion: a 1976 plant in Tunisia added capacity for the Neptun 22 alongside Lage production, and the growing model range eventually strained the business. Neptun Boote GmbH filed for insolvency in early 1980, and Eberhardt's children — Rudi, Waldemar, and Annette — refounded the company as Neptun-Yachten Eberhardt KG, adding the Neptun 23 in 1983 and splitting production between the Lemgo and Warburg locations. In 1984 Sailing Crew, the firm that had handled all of Neptun's interior fit-out, took over the original molds and naming rights and relocated operations to Rheda-Wiedenbrück, where the 22, 23, 25, 27, and 31 went into series production; the yard later shifted toward individualized fitting-out and expanded into boat repair and refit work. A move to new halls in Oelde followed between 1998 and 2004, splitting new-build from repair-and-refit work, before Pascal Ernst took over the business in 2006 and moved the repair-and-refit side back to Rheda-Wiedenbrück. Neptun Yachten GmbH was founded in 2013, when Scarlett Ernst joined the family firm and the company absorbed the Dobertin business, including its stainless-steel fabrication capability and the mold for a new Neptun 21; in early 2024 the yard also acquired the molds and rights to the Falcon sailboat.
The designers
Two outside designers shaped the yard's most consequential models. Engineer Anton Miglitsch of Bremen, also known for his sea-going and offshore-racing cruiser designs, drew the Neptun 22 Miglitsch, first built in autumn 1968; its success drove development of the 26, 29, and 24 — the boat aboard which Gerhard Diekow crossed the Atlantic in 28 days. Boat builder Lothar Leichtfuß contributed the Neptun 22 Backdecker, fitted with a lifting roof, which Neptun-Yachten's own history credits as the best-selling yacht in Europe.
Construction through the eras
The Warburg plant, opened during the Backdecker-era expansion, brought the lifting-roof Neptun 25 and the 27, along with the yard's first boats built with a profiled rudder blade; the 22 itself later received a facelift and a newly developed balanced rudder. Across the range, Neptun-Yachten laid up hulls by hand in glass-fiber reinforced polyester and offered both fixed-keel and shoal-draft keel-centerboard configurations on some models. Decades later, the yard partnered with the Fraunhofer Institute to develop a built-in electric drive for sailboats, testing a prototype installed in a Neptun 25 on the Edersee.
Lines and generations
Beyond Rheda-Wiedenbrück, four other boatbuilding stories answer to a version of the same name. In Sweden, the Neptunkryssare — the "Neptune cruiser" — began in 1938 as a one-design commission: designer Lage Eklund built it for his friend, the painter Einar Palme, whose finished boat, Après Vous, carried him around the Stockholm archipelago and Lake Mälaren for almost thirty years. The design was recognized as a compliant 15-square-metre skerry cruiser but has always sailed as its own class, governed since the early 1940s by the Neptunkryssarförbundet; construction moved from pine to mahogany planking in 1962, to the first GRP hull in 1976 (molded from the last wooden boat, No. 217 "Diva"), and finally to an approved aluminum rig in 1982. Sweden's class association has counted roughly 275 of the roughly 300 Neptunkryssare built as still under sail, with about 30 based in Germany.
In the United States, Jon Williams and Bill Smith — nine years into careers as Santa Monica Bay sailboat dealers — founded Capital Yachts Corp. in 1971 after buying the Newport Fleet's tooling from Elgin National Industries; the Harbor City, California builder produced Newport, Neptune, and Gulf sailboats until closing in 1996, updating its Newport fleet with naval architects Gary Mull and Cuthbertson & Cassian. In France, Jacques Fauroux designed the Neptune 5.50 in 1979 for the Micro class, created two years earlier by the now-defunct magazine Bateaux; the French Neptune yard closed in the 1980s, but its owners' association kept boats coming for several years, and the design reappeared in 2004 as the Go 5.50, built by Indigo Yacht. A British Neptune 33 also carries the name in this site's catalog — a separate design, not to be confused with the unrelated Neptunian line.
Who Neptun is for
For most buyers, "Neptun" means the Rheda-Wiedenbrück yard's hand-laid GRP cruisers — boats built by a family business that has weathered one insolvency, three relocations, and four ownership generations since 1964 without losing its own molds. Anyone encountering a Swedish Neptunkryssare, an American Capital Yachts Neptune, or a French Fauroux-designed Neptune 5.50 is looking at a genuinely different boat that happens to share a name — worth knowing before assuming shared parts, shared history, or a shared shipyard.
