I suspect that it's a Voit knife, given the other product placements. But Eagle Z1 would be glad to Photoshop it into their own.
Product placement didn't exist back then in the way it does now. The property master would simply go buy whatever. For instance even Bond's Rolex watch back in the day wasn't a placement deal, but merely a selection of the property department. (In contrast to the over-the-top Omega product placement that exists in today's Bond movies.)