This B199 module has "neLco" printed in red throughout the green board. There are two round inspection stamps in the middle of the component side toward the extraction handles. "DEC FLIP CHIP" is printed in solder down the module's center. "FM ADDRESS DECODER B199B" is printed in solder along the edge.
Digital Equipment Corporation (DEC)
This number is stamped on the fave of both extraction handles
This number is found printed in white on top of the gray rectangular module.