Wilkanowski is thought to have produced 5,000 violins and 100 violas by 1942. Some of the higher quality violins were marked with an inlayed logo of the stylized letter "W"; these instruments are thought to be entirely of his own making, while many of the others were made in the shops with assistants. The Gretsch Company released the Synchromatic line during the early '40s also, which were also archtop guitars, but shared no other similarities with Wilkanowski guitars. His role in the Synchromatic is not known.