Thank you for this information. Federal’s disc production was enhanced by valuable contracts with Sears (pressing blue label, and later tan label Silvertone records) and The Charles Williams Stores (issuing black label Resona discs). The Silvertones and Resonas produced by Federal were numbered in lock-step with the Federal issues — but are much more common than their original Federal counterparts! The ultimate demise of Federal may have been caused by losing their contract with Sears to a cheaper supplier.