Standard distributor condenser for 23D/25D distributors. These can be identified as having one wire that connect on the top of points strap via nut. It is always a good idea to keep a spare condenser, as when they fail they can strand you.
Ignition Condenser - 23D / 25D
Fits:
Minis 1959-74,
MGA 1955-62,
MGB 1962-74,
Sprite / Midget 1958-75,
Reliant Regal, Rebel 1969-74.
Other British cars w/ 23D/25D.