I got a call from the vendor today to have a look at one of their customer's incoming line which is causing a lot of problems for them. Anyway, the vendor hinted that its a very old system. And when it comes to old system, dirt, dust and hidden away are usually the words of the day.
However, when I arrived at the premises, I was pleasantly surprised because the system was very well kept. This is a Toshiba Strata DK56, a 1990's system and its still working fine!