I bought about 500 50c Outpost Casino, Pacheco from the owner of the Outpost, John Schirek. I received about 30 of these hot stamped chips mixed in -- same base color and edge spot as the inlaid chips. When I inquired about them I was told that they were the "old" chips that were later replaced by the inlaid ones.

I've bought and sold maybe 5000 outpost chips from both Pacheco (just the 50c) and San Ramon and have seen quite a few variations.

Pacheco 50c: Hot stamped OP; Inlaid double 1/4" edge spots; Inlaid 1/2" edge spots

San Ramon chips all have LCV and SCV variations except for the $100 (LCV only)
The "error" brown 25c I have only seen SCV for, but I've only seen about 30 chips.
The $1, $5, and $20 also have a giant inlay RHC mold version