This is a New Old Stock (NOS) Lucas L488 lamp (2 3/4" diameter), available in red, amber and clear, and with a single or dual filament bulb.
It is correct for many, many British cars, including Jaguar XK120, Austin-Healey 100, early Land-Rover, Triumph TR2, Morris Minor Traveler, Austin, Aston Martin and many others.
L488 lamps are one of our specialties, and we have a large stock of lamps and lenses: new, used and new old stock originals; some can be seen in Related Products below. Please contact us for used original lenses or lamps.