This chip is listed in TCR as N2084. It is also listed as N2084.C for a cancelled chip at considerably lower value.

Lots of these chips are around drilled, but according to James' book, only 5 are known not-drilled, and one of them is notched. He calls them R-9. This may be the notched one as it has one side faded, probably from display on a manufacturer's board. I paid an "S" price for it. Deserve a TCR listing as N2084.N maybe? If so, the .C listing should indicate the cancel with a drilled hole dropped it to a $50 chip.