Sound Level Meter

Quite an unusual project, I was supplied with an old Sound level measuring device, and asked if I could turn it into a clock. This is the end result, the meter now sits on it's side with 4 nixie tubes on the top, and the original dial that used to indicate the number of decibels now shows seconds. 

You are more than welcome to send something in for me to work on, if you can't find anything in the starting points section.