TCR9 lists one $1 chip from the Hotel San Remo. Looking at these two chips, I note several differences. The chip on the right is in new condition, the chip on the left is lightly used.

Chip colors are different, beige vs. white.
"Las Vegas, Nevada" is larger on the left chip.
On the inlay, color around "Hotel San Remo" is darker on the right chip.
The yellow bar around "Hotel San Remo" is larger on the left chip.
The "S" touches the top of the bar on the right chip.
There is a gap between the top of the "S" and the top of the yellow bar on the left chip.