From the cap I can tell it's a TEC distributor, with the words Honda PP~T on the cap. I've went to a Honda dealership to have this identified and matched with a couple of distributor caps they have...and none seemed to match up. The service rep could not identify them.

The cap is bigger than the usual, and came with my obd1 B18C1. The Integra caps from autozone and carquest do not match up and are smaller than what I have. Could these be from an accord or an OBD2 distributor?

Does the distributor itself have any other serial numbers I can use? This cap is due for a change soon, so I really need to track down what this came from.