Question: What was succeeded by the Aston Martin DB6 and was released in 1963?

Context articles: Lola-Aston Martin B09/60
Aston Martin Racing
Nimrod Racing Automobiles
Aston Martin DB6
Aston Martin DBR5
Aston Martin DBRS9
Aston Martin DB5
Aston Martin Vantage N24
Harold Beach
Aston Martin Lagonda

The Lola-Aston Martin B09/60, also known as the Aston Martin DBR1-2, is a Le Mans Prototype sports car built by Lola Cars International and co-developed with Prodrive for use by Aston Martin Racing.
 It is the first prototype to bear the Aston Martin name since the AMR1 in 1989.
 Aston Martin's internal name for the car, DBR1-2, refers to the specific DBR1 chassis which won six races in 1959 en route to clinching the World Sportscar Championship as well as that year's 24 Hours of Le Mans.
Aston Martin Racing is a British auto racing team established in 2004 as a partnership between automobile manufacturer Aston Martin and engineering group Prodrive.
 The partnership was initially created for the purpose of returning Aston Martin to sports car racing with the DBR9, a heavily modified variant of the Aston Martin DB9.
 Since the DBR9's racing debut in 2005, Aston Martin Racing has expanded to build a variety of cars available to customers, as well as development of Aston Martin's V12 engine for Le Mans Prototype use.
 Aston Martin Racing's program has earned several successes over the years.
Nimrod Racing Automobiles (sometimes referred to as Aston Martin Nimrod) was a partnership founded in 1981 between racing driver and car dealer Robin Hamilton and chairman of Aston Martin Lagonda, Victor Gauntlett.
 The project was intended to build sports prototypes for the World Endurance Championship and IMSA GT Championship using Aston Martin V8 engines.
 Although Aston Martin did not own the project, they offered their support for the chance to see success for their name in motorsports without the heavy cost of running their own team.
The Aston Martin DB6 is a grand tourer made by British car manufacturer Aston Martin.
 Produced from September 1965 to January 1971, the DB6 had the longest production run up to that date of any Aston Martin model.
 The DB6 succeeded the Aston Martin DB5 and featured improved aerodynamics and specification over its predecessor.
The Aston Martin DBR5 (also known as DBR5/250) was a Formula One racing car, designed by the sports car manufacturer Aston Martin.
 Following the poor results of the Aston Martin DBR4 in the 1959 Formula One season the lighter and smaller DBR5 was intended to be quicker than its predecessor.
 However following poor results in 1960, Aston Martin decided to withdraw from Formula One.
The Aston Martin DBRS9 is a racing car built by Aston Martin Racing to be a cheaper alternative to the Aston Martin DBR9, both of which are based on the Aston Martin DB9.
 The DBRS9 was introduced in 2005 and has since been replaced with the Aston Martin V12 Vantage GT3.
The Aston Martin DB5 is a British luxury grand tourer that was made by Aston Martin and designed by the Italian coachbuilder Carrozzeria Touring Superleggera.
 Released in 1963, it was an evolution of the final series of DB4.
 The DB series was named honouring Sir David Brown (the owner of Aston Martin from 1947 to 1972).
The Aston Martin Vantage N24 is a race car introduced by Aston Martin in 2006, based on the V8 Vantage road car.
 In late 2008, Aston Martin debuted an updated version of the N24, with the newer Aston Martin Vantage GT4, which featured a larger 4.7 litre engine.
Harold Beach (15 February 1913 - 24 January 2010) was a British engineer for Aston Martin, and their Chief Designer.
 He designed chassis and suspension for the iconic 1963 Aston Martin DB5, and the 1958 DB4 and 1965 DB6.
The Aston Martin Lagonda is a luxury four-door saloon which was built by Aston Martin of Newport Pagnell, England, between 1974 and 1990.
 A total of 645 were produced.
 The name was derived from the Lagonda marque that Aston Martin had purchased in 1947.
 There are two distinct versions, the original, short lived 1974 design based on the Aston Martin V8 and the wedge-shaped Series 2 model introduced in 1976.