The Lyman Boat Works exclusively used silicon bronze and brass fasteners after WWII with some galvanized fasteners for buried structrual parts above the waterline. I stock a wide variety of fasteners in various sizes including oval headed screws with cupped finish washers for the interior pieces of your Lyman. Additionally, the majority of the silicon bronze clinch nails and regular nails are new/old stock from the the Lyman Boat Works.
Please call (419) 884-0222 or email firstname.lastname@example.org if you have any questions about what size/type of fasteners are required for your Lyman. I also have many other brass, stainless steel, and chrome plated fasteners. Please call or email for details and availability. If you don't want to pay online, call or email for alternate payment and shipping options.