If you can post scans of the chips here, I'm sure someone would be glad to provide accurate info. A description of the chip would be helpful if you do not have a scanner or digital camera. The pictures can be posted here by following the "File Upload" link at the top of the page.
There are many guides available depending on the area / category of your chips. There are two good ones for Nevada chips, The Chip Rack (TCR) and The Official U. S. Casino Chip Price Guide.
There was a Foxxy Casino in N. Las Vegas, 1974-75. TCR lists 4 chips but two of them are imitations. The value for the imitations is $1-$2. The other two are:
$1, Mustard, Nevada Mold, Gold Hot Stamp, Value $40-$49
$5,Red, Nevada Mold, Gold Hot Stamp, Value $50-$59