In short
A resin 1:43 scale model of the unique Touring Superleggera–bodied Giulia GT Spider Prototipo shown in Turin in 1963 — a 105-series Alfa Romeo that never reached production, rendered in show-car white by Matrix Scale Models.
The Giulia GT Cabriolet Spider Prototipo sits at the very origin point of one of Alfa Romeo's most celebrated platforms. Presented around 1963, it represented a road not taken: an open-top interpretation of the 105-series GT coupe that Alfa Romeo ultimately chose not to put into series production. Matrix Scale Models, a specialist resin producer, has committed this footnote of Italian automotive history to a precisely detailed 1:43 miniature.
The 105-Series Platform and Its Twin-Cam Engine
Introduced in 1963, the Alfa Romeo 105-series Giulia GT range was built around a twin-cam inline-four engine. The platform's combination of a rigid bodyshell, independent front suspension and a well-located live rear axle gave it handling qualities that would support everything from the road-going Sprint GT to the competition-derived GTA of 1965.
One Show Car, One Coachbuilder, No Production Run
Carrozzeria Touring Superleggera constructed the Giulia GT Spider Prototipo's body using their patented Superleggera method — a skeleton of small-diameter steel tubes clad in hand-formed aluminium panels. The prototype was displayed in white, a standard convention for Italian show cars of the early 1960s, where pale finishes were chosen to throw bodywork creases and lines into sharp relief. Alfa Romeo's decision to continue with closed coupe variants left this open-top design as a genuine one-off.
Matrix Scale Models: Resin at 1:43 for Rare Subjects
Matrix Scale Models is one of the few 1:43 producers that systematically addresses Italian and British coachbuilt prototypes overlooked by mainstream diecast manufacturers. Working in resin, the brand achieves the fine-surface resolution that low-volume, hand-finished bodies demand — particularly relevant for a Superleggera-built shell whose curved aluminium panels carry subtle transitions no injection-moulded tool could economically reproduce. The white livery of this model directly reflects the prototype's 1963 Turin show presentation.
The Giulia 105-Series Story in the Cabinet
This model earns its place as the opening chapter of a Giulia 105-series study collection, illustrating how a single 1963 platform inspired road, open-top and racing variants across more than a decade. It stands out as a display piece for collectors focused on the Superleggera construction method and its coachbuilt legacy.
Frequently asked questions
Was the Giulia GT Cabriolet Spider Prototipo ever put into production?
No. The car remained a one-off prototype. Alfa Romeo continued the 105-series GT line with closed coupe variants.
Who built the body of the original car?
Carrozzeria Touring Superleggera, using their patented Superleggera construction — small steel-tube framework clad in aluminium panels.
What scale is this Matrix model?
It is a 1:43 scale model cast in resin, finished in white to match the prototype's 1963 Turin Motor Show presentation.
Why does Matrix Scale Models produce this subject?
Matrix specialises in rare Italian and British coachbuilt subjects that mainstream diecast manufacturers do not cover. The Giulia GT Spider Prototipo, as a single-example show car, is precisely the kind of historically significant but commercially overlooked subject the brand targets.
Frequently asked questions
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