1967 GT500 automatic choke cap ID

Can anybody tell me what the original black automatic choke cap on a 67 GT500 was marked? I have the 65 to 72 Ford car parts books and have studied them but not found anything for a 67 dual quad set up. Last week there was an automatic choke assembly on eBay and the cap was marked TD. I have several caps and I installed one with the largest coil inside and it seems to work fine. But I’d still like to know what an original cap was marked. Any thoughts? Thanks!