Magna Pickups

I have just  ordered my first Bartell Spyder and also a pair of the Magna Starstream pickups. Does anyone know if those pickups were designed and made by Paul Barth? Information is scarce. Lots of sellers on auction sites say that those were DeArmond pickups.  I believe they are Barth made, so far. Could anyone verify that. Thank you.

Hooba Tooba