I read on line that the dead wax marking at the nine o'clock position of Decca LPs refers to the mother number coming from a particular lacquer, and the marking at the three o'clock position refers to the stamper number coming from that mother. On my copy of the Solti Beethoven ninth from 1972, at nine o'clock, there is a 2 and a B. This could mean the second mother of the lacquer ? Anyone know what the B means ? At three o'clock, I see K and G. Using the Buckingham code, this refers to 4 and 7. Does it mean this is the 47th stamper from that mother ? This seems a lot, as I thought a mother usually only produces about 10 stampers. Or could it be referring to the 47th stamper of the whole production run ?