The next time The Dynamic Duo are stuck to a magnet by the metal in their utility belts (which nearly becomes their undoing!) is in the 1966 Batman movie.
Leslie Parrish is seen wearing the exact same gold outfit as Linda Lorimer in Season 2 episode, The Clock King's Crazy Crimes, as the Car Hop who serves The Dynamic Duo "Bat-Burgers" and again at the end of the season as Glacia Glaze/Emma Strunk in episodes Ice Spy & The Duo Defy.
After Bruce Wayne escapes, Penguin's henchmen arm themselves each with a M1 Thompson submachine gun, commonly referred to as a Tommie gun, and probably gotten through war surplus after WWII.