Its an early Mallory marine style distributor, the wires are held in the cap via the two top screws with a small diaphram that sealed the cap, yours has a tach drive, looks to be small block chevy.. dual point four lobe, you can`t buy the condensor for those any more, haven`t made them for twenty five years, they really put out the spark, used to run one in a `68 dodge 383, really ate plugs up fast.