I now have a good inventory of hard-to-find "side entry" distributor caps with solid brass contacts! They're a well made, tight fitting cap that won't let you down! The brass terminals will last for years compared to the aluminum terminal caps. These fit any DM2, 23D, or 25D 4 cylinder distributor, but are designed for a TR3 or TR4 (as examples) with the electrical terminal at a 180 degree opposed position to the plug wires.
These now have a Lucas logo on top very similar to original and improved internal screws!!!
*** This is NOT the correct cap for MGs with 90 degree opposed terminal and plug wires***