One image shows the interior lining of a vintage wool cap labeled "The Glenway Cap" featuring a CC41 utility clothing mark.

The CC41 symbol (often nicknamed the "two cheeses" or resembling Pac-Man figures) stands for Civilian Clothing 1941, a wartime and post-war austerity standard introduced in the UK during World War II to regulate the quality, utility, and material usage of civilian apparel. This means your cap was manufactured under this government utility scheme, which ran from 1941 until 1952. The number 206 is the specific manufacturer or factory code assigned under the scheme, and the handwritten 14 1/2 likely indicates the hat's size in inches or an old sizing convention.