You probably already know this and have determined that these do not apply to this chip, but just in case, I posted The Gaming Table's closest matches below. I know they don't match perfectly. There are pictures of the chinese character chips from Union Hing on page 278, but they don't match, though the hub seems right.

One of those symbols MIGHT be a 5, as there is a similar symbol identified as 5 in the book, but I'm just guessing.

Union Hing Co.
422 Sl Clark St.
Chicago, IL USA
Mold: HUB
Chinese characters
Owner: Lun Hing
Opened: c.1946 Closed: Yes
AND
United Club (Chinese characters)
27 E. Douglas Alley
Reno, NV USA
Mold: SM-KEY
Opened: 1962 Closed: 1964