The image you provided shows a Matchbox Models of Yesteryear 1936 Jaguar SS100.
Here's some information about this diecast model:
Model Series & Identification: It is part of the "Models of Yesteryear" series by Matchbox, specifically identified as Y-1 or Y-1/3.
Production & Scale: This particular model of the 1936 Jaguar SS100 was produced from 1977 and is in approximately 1:38 scale, though some listings also mention 1:43 scale for certain variations.
Material: The model is made of die-cast metal, characteristic of Matchbox cars.
Collectibility: It is a commonly seen model, but certain variations like steel grey versions or off-white versions with small sidelights are considered more sought after by collectors.
Real Car Basis: The original Jaguar SS100 was a British 2-seat sports car manufactured between 1936 and 1941.