Thanks for your thoughts.
I have several Fishers and Teknetics, they all use a five pin connector now. The 5" DD, 10" elliptical, and 11"DD all look almost identical between the models.
While some coils are labeled, several are not. Or at least I can't find anything legible on them.
When I added a coil to my collection, I used a paint pen and marked them. I have one coil off ebay I'm not confident in, but it's probably alright.