Having been back up in my attic rummaging around I found the very first RTR loco I purchased from Bachmann in 1999.
According to a few RMWeb threads , this particular early example 31813 could be a victim to `Mazak Hypotrophia` I prefer that to `cancer`............
...............................................rather like this example on Ebay................................................................
http://www.ebay.co.uk/itm/Bachmann-OO-GAUGE-32-152-N-CLASS-BR-BLACK-EARLY-2
