There's no infinity focusing helical for the 90mm Elmar on Visoflex, but there is one for the Focaslide. The Focaslide is a lot thinner than any Visoflex.
But, this looks like the common M-mount Viso helical.
Unless the seller can re-unite it with the correct RF-coupled focusing mount, this lens is likely never be accurately RF-coupled again. Sad.