Almost ten percent of the production was exported to countries such as Argentina, Belgium, Chile, Colombia, Finland, Poland, and Portugal.

[6] To help with personalization, there was a very extensive range of accessories: from chrome hubcaps or spoked wheels, to metal trays or roof racks to make up for the lack of storage spaces.

Starting in July 1958, a fixed profile convertible body with a sliding canvas roof was also offered, which increased the price by 5,000 pesetas (€30.05).

[3] Among the reasons for ending production were the thin and weak B-pillars, which made it difficult to properly install seat belts after stricter passive safety requirements came into force.

[5] As of 2023, it is estimated that there are still about 10,000 Seiscientos in circulation in Spain, and there are more than a hundred fan clubs that organize meetings and excursions every weekend.

In 1966, the 600 D underwent a restyling incorporating bumpers with more curved lines and rubber overriders, larger seats and cream-colored wheels.

The final production run is the 600 L[e] and the 600 L Especial (1972–1973), which incorporate a triangular air vent in the C-pillar to compensate the interior pressure when closing the doors.

[6] A slightly longer, four-door saloon version, the SEAT 800, was manufactured between October 1963 and May 1967, starting sales in January 1964.

The modification of the bodywork and painting were carried out at Carrocerías Costa in Tarrassa, after which it was incorporated into the SEAT assembly line to receive the mechanics, windows, trim and finishes.

[24] The biggest issue with the SEAT 600 is the engine's water cooling system, which causes regular overheating when driving at low speed and overloaded –exceeding its maximum authorized mass–, something that used to be common.

[25] The thin and weak B-pillars did not have space or solidity to fix the robust seat belt anchors needed when stricter passive safety requirements came into force, being this one of the reasons for ending production.

[3][26] Being such a popular vehicle, it appears extensively in the Spanish cinema of the time, even becoming the center of the plot as in the film Ya tenemos coche (1958), directed by Julio Salvador [es], in which a family struggles to buy a Seiscientos.

It is also widely used in later Spanish period films and television series depicting the era, such as in Cuéntame cómo pasó (2001–2023) in which the first car the protagonist family has is a SEAT 800.

[3] It has several monuments built in its honor throughout Spain, as in Fuengirola (Málaga) –inaugurated in 2008–,[27] Churriana de la Vega (Granada) –2011– and Martos (Jaén) –2014–.