Inner wax writings


I have often noticed "Masterdisk" imprint around dead wax...some impressions appear handwritten and some typographical. Any informed theory/knowledge/reference would be greatly appreciated.
digmusic
Post removed 
Marty, your reputation precedes you. Does dead wax scribbling tell you anything more about the pressing, the era, the LP...etc?
Post removed 
Thanks for sharing...To follow up on the master/safety distinction: Japanese LPs seem to command some price premium over the years reflecting better quality. Would you say part of that quality is in their mastering process?

Certain Blue Note dates were never released domestically while Japan got the 1st pressing. Any comment about that?
More to discover