Royal Crown Derby buyers know their piecesand prices,and it will reach its own level.

I found a royal crown derby bone china quartz clock in a charity shop about six months ago, its a quartz clock that needs a battery.
I finally got around to putting it up for auction yesterday, starting bid 99p, came home from work today and the bids are already at 50 pounds!!!!
I just checked the royal crown derby website and they sell them for 345 pounds.
My question is should I add this info on to the description or just let the auction run?

OP the clocks on the Royal Crown Derby website have the mark in a straight line

Royal Crown Derby

yours is

Royal Crown
Derby

How certain are you that it's genuine?