We had to look up nixie tubes
on Wikipedia to fully understand this clock. When we did, what we took away was that the device is essentially a glowing gas tube shaped like a numeral, developed in the fifties. This series of clocks using the tubes fully capitalizes on the mid-century industrial charm.
One of our friends thinks it looks like it's counting down to armageddon, but we're not swayed. It's cool.
• Nixie Clocks at BDDW