Marilena is an Italian company (sportwear), it went on to sponsor Arrows in the early 80s (83?, do you remember the race-by-race deals?).
Pioneer money was from the Italian importer, who was actively involved in motosport, mainly formula cars, Riccardo Paletti was one of the recipient, when he drove for Mike Earle in F.2 and Osella in F.1.
I'll look for pictures as soon as I can....
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