Yeah I was thinking the back plate might be dodgey too.
Then again the pedal can't be that new as the power adaptor plug looks like one of the older style ones that go right down to the bottom of the pedal. Newer pedals seem to have it only about two third of the way down.
Mine is sitting here in front of me getting more expensive by the minute for my retirement fund...... MIJ.black label '84 vintage...a little chipped from years of use.....but the relic look is in these days and this one is all original.................