code flags or international signal flags are used by ships at sea individually to spell out short messages or in combinations with special meanings

It’s a lightweight Lumberjack-style shirt made from hardwearing polyester fleece with a quilted lining to the body and sleeves

so won't absorb moisture if you keep them in a soggy locker and nor will they turn everything black

Although only a handful remain in service today

Now Admiralty Chart 1346

Dr Crabtree's Patent Observatory Magnifier KITCHENWARE code flags or international signalBelieved by some to have been designed in 1804 by the legendary British inventor and polymath Joseph Crabtree, the functional simplicity of his brass and glass domed "Observatory" magnifier has never been surpassed or needed modification. Magnifies about 3x. Diameter 2", height 1".