Set of 2 Showa Retro Aluminum Lunchboxes Red Rose Design - Made by Daiwa Aluminum? Oval shape, approximately 15cm long, 10cm wide, 5cm high. Red Pink (Nadeshiko) Design - Made by Nikko Denka? Oval shape, approximately 14cm long, 9cm wide, 5cm high. Both are made of aluminum. These are two cute red lunchboxes with floral patterns, made in the mid-Showa era (about 60 years ago). Aluminum lunchboxes were produced by many manufacturers at the time. These are products from two of those companies, with their markings visible on the bodies. There is no rust, but please understand that these are old stored items and may have scratches and small dents.