This notched chip is shown in The Chip Guide, with a statement that it is not listed in TCR.

TCR does list E2636 which sounds kind of like the one shown, but the denom color and inlay design description are different. It has a "no market" symbol for value. There's also a note that says it is a Langworthy product so someone must have researched it in the past.

James lists a LVHilton second issue chip that sounds like this one but indicates it is unique. There's no picture of the 25, but the picture of the 100 has an inlay design with the big-H logo like this one has.

The scan shown was entered in TCG by Alex and shows a notched chip, which could be the case if it's truly Unique.

I'd like to know if E2636 was entered in TCR based on the chip shown in the image. If so, the detail in the description there should be updated and the entry in The Chip Guide should show the TCR catalog number.