You can see in this video he says it is the low wind MM pickup, with hex poles i.e. the 1400 model.
I bought one last week, still not installed but will give it a try in the future.
The MM vintage 1300 were around 13K ohms, the new reissue 1300 is 14K ohms. Yes, It's been said the Mighty Mite 1300's were basically their version of a Dimarzio Super Distortion.
The MM vintage 1400 were the same magnet/pickup just less winds, they were around 9K ohms, the new reissue 1400 is 9-10K ohms. My reissue 1400 measures 9.95K ohms.
Some say the vintage 1300 and 1400 pickups sound slightly better but the made in USA reissues are damn close. The 1400's are a very very aggressive, super crunchy ceramic magnet PAFish pickup and is actually a cool pickup IMHO. That Ossie Ahsen pickup shootout from a couple of years ago shows what they sound like and this video is the 1300 higher output ones.