Bonhams Bonmont 2025 brings a varied line-up, with everything from Enzo-era Ferraris to an ex-Nico Rosberg Aston Martin Valkyrie on offer on June 29 in Chéserex, Switzerland.
In prior years this has been a hypercar hotspot, with varying results – and while there’s certainly plenty of carbon on show, there’s a more wide-ranging selection, including several oddities from the fringes of the collecting world. Here are just a few of the more fascinating lots.
The Bonhams Bonmont 2025’s leading car on pre-sale estimate is this 2022 Aston Martin Valkyrie, first delivered to Monaco for former Formula 1 driver Nico Rosberg. It’s just had its software updated by Aston Martin, although further details on its life are currently scarce. It’s estimated at between CHF2.6m and CHF2.9m. Other hypercars in the sale include a 2021 Ford GT Carbon Series (est CHF700k-CHF750k) and a 2013 Lamborghini Aventador LP700-4 (est CHF230k-270k).
This 1967 Ferrari GTB/4 Berlinetta was first supplied to Italy, in the care of an ex-Mille Miglia racer turned doctor. A regular Ferrari customer, Dr Augusto Caraceni was the son of Domenico Caraceni, tailor to Humphrey Bogart and Aristotle Onassis; he specified chassis 09603 in Amaranto with beige leather interior. It was exported to the US in the late 1960s, and while in the care of several stateside owners it was converted into a NART Spider by Straman Auto Restoration of Costa Mesa, California.
In 1987 it joined the Yoshio Matsuda Collection in Japan, before heading to California again in 1996. It soon found its new owner, the vendor, who eventually set Ferrari the task of a no-expense-spared restoration back to its original specification. Ferrari performed the body restoration itself, while the mechanical side was handed over to Autofficina Bonini Carlo Srl. In 2017 it was awarded Classiche certification. No estimate had been released at the time of writing.
This Vanvooren-bodied 1936 Bugatti Type 57 Berline is one of five extant out of the 17 Vanvooren saloons constructed. Chassis 57414 was first delivered to cheese-maker Otto Graf, of the family that were first to produce Crème de Gruyère. He retained the car until his return from an internment camp during World War Two, upon which he sold it to an enthusiast from Lyon.
In 1956 Albert Riegel from Alsace took stewardship, followed by hotelier Henri Meurdra. Dr John Bayard Britton, a US Army doctor, acquired the Bugatti in 1954 and would take it back to Florida with him. He kept the Type 57 Berline for more than 40 years, until his murder in July 1994. It was then sold to Laverne and Marlene Johnson of Missouri, and restored and displayed at various concours events. Following Laverne’s passing in 2013, it was sold to the current owner via Jack Braam-Ruben, who commissioned a full restoration of the car. It’s estimated at between CHF190k and CHF260k.
This 1971 Intermeccanica Italia Spyder’s early life is scarce, with the traceable story starting in 1994 with Daniel Thomas Croff in California. It was later acquired in an estate sale, with further research from Bonhams pointing to many years in storage before heading to restoration, only for the workshop to cease operations. In 2011 this Intermeccanica was in the ownership of Jason Tessler of Van Nuys, who sold the car to the current Swiss vendor in 2022. Believed to be the only Italia known to have recessed Dino 246 tail-lights, it’s estimated at between CHF120k and CHF140k.
This 1964 Aston Martin DB5 originates from the UK, and details released by Bonhams indicate that it was owned by a GG Edington. It was restored in Britain in 2013, and comes with a BMIHT Certificate. It’s estimated at between CHF650k and CHF700k.
This 1966 Rolls-Royce Silver Cloud III DHC was first delivered to London via HR Owen. It’s believed to have been formerly owned by John Lennon, courtesy of a 2003 document from the Rolls-Royce Museum in Austria to a previous Swiss owner, a Mr Bucheli, saying as such, and backed up by a copy of its Rolls-Royce build sheet. Offered without registration documents, it’s listed as no reserve and has an estimate of between CHF80k and CHF120k.
This 1981 Porsche 924 Carrera GT is believed to be one 26 Black A1-painted Carrera GTs to remain; 406 of all colours were built. Originally supplied to Geneva, its second owner was the president of Porsche Romand, who kept it for 20 years. It’s had refreshment of the front seats, exhaust system, paintwork and suspension, and has been used in several local Swiss rallies. It’s estimated at between CHF90k and CHF120k.
One of the more unusual lots at the Bonhams Bonmont 2025 sale is this one-off 1971 Ford Escort Monte Carlo. Based upon an Escort 1300 Mk1, the body was crafted by Frua as a prototype for the 1971 Paris Auto Salon. In 1972, Frua sold the car to the wife of a Swiss architect, who then sold it to Monte Carlo, where it stayed between 1980 and 1998. The third owner kept it until 2016, and the vendor acquired it in 2018. It’s believed to have been restored in 2003, when its colour changed from the original brown to its current hue. It’s estimated at between CHF50k and CHF60k, and is offered at no reserve.
This 1974 Ferrari Dino 246 GTS, chassis 07884, was first delivered to the US and is one of 29 to be finished in Celeste Metallizzato. Imported by Luigi Chinetti and sold by Swing Motors of Maryland, it called Pennsylvania, New York and New Jersey home before being sold to Switzerland in the care of Frank Fischer in 1989. He kept it for 13 years, and the vendors have owned it since then.
After being painted red while in the US, a glass-out restoration back to its original colour was performed a Swedish specialist, which removed the US-spec side-marker lamps. The engine was also overhauled, and the MPH speedometer replaced with a KP/H one. The seats were reworked as well. It’s estimated at between CHF450k and CHF500k.
This 1956 Bentley S1 Continental was first sold to Switzerland, to an M Dubois. It’s had only one owner since, also in Switzerland, and between 2023 and 2024 it had its front suspension, brakes and steering overhauled. The interior was retrimmed at the same time. It’s estimated at between CHF450k and CHF550k.
Further details
For more details on the Bonhams Bonmont 2025 sale, head here.
