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In page Aston Martin DB4:

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A convertible was introduced in October 1961.[1] It featured in-house styling similar to the Touring saloon, and an extremely rare factory hardtop was also available. In total, 70 DB4 convertibles were made from a total DB4 production run of 1,110 cars.[2] 30 of these were Series IV, with the remaining 40 belonging to the Series V. 32 of the total convertibles built (11 and 21 of the different series respectively) were equipped with the more powerful Vantage engine.[3] Top speed for the regular version is about 136 mph.[4]