The Atomic Jr is a 5-watt, single-ended amplifier, similar to the classic Tweed Champ design. Despite its compact size, it offers great versatility, being one of the few low-wattage amplifiers to feature built-in spring reverb. This example also comes equipped with Swart's factory-built attenuator, complete with a bypass switch for added flexibility. It remains in excellent condition, showing only minor signs of previous wear.