Sgt. Saunders (whose 1928 Thompson carried 3 million bullets in a 30 round clip and he NEVER needed to reload) always wore a camoflage cover on his helmet - I thought it was a Marine cover (may have been in real life), and never understood how he came by it. But at least now I know that it was "issue"... Of course, Saunders wore it through out the 5 years of the show (never getting out of Franceicon), and he must have missed the "recall" order.

Thanks for clearing up one of the mysteries of my youth!