On the front of the belly glass ware the serial number is there are on some machines I have a new blue sticker. It is about 3/8 tall and the same length of the sticker behind the glass. You can see the serial # but there is a new # on the sticker. Is this a new serial#? If so anyone know wye? The DD I just got has a original# behind the glass of 1505 and the new sticker on the front of the glass has one in the 2300 range.