Unknown gambling token

Obverse:Top - stylization of Chu ???
Right - non-Chinese character
Bottom - 50
Left - Mu - Mother; old woman; capital

Reverse: Plain

I suppose that it is gambling token.

Your identification of the top character is correct Chu = exit, to leave. I am not sure about the right hand character. It may be two characters together Yueh (moon) and Wang (king), but I'm not sure.
I have this token as well. It is part of the series of four tokens in different colors that I mentioned to you before. This is the red token. It is supposed to be a gambling token from San Francisco's Chinatown, but I have never found any literature to verify this statement.
I have seen three sets of this token in three different places here in the U.S. The "50" has always been red, and I believe the "500" was yellow. I wonder if you have some kind of error coin?

I found this information in the TAMS Journal (of the Token & Medal Society) in a series of articles on American game counters by Russell Rulau and George J. Fuld. There is a lengthy catalogue in the Dec. 1972, issue and several supplements over the next three years.

The first supplement (v. 13, no. 1, Feb. 1973), p. 24. Chapter XIII -- Store Card Counters (1) California - describes a set of five pieces, three of which match the three you show on your pages (gamble2.htm & gamble3.htm). The description from the catalogue is as follows [the ones you have are marked *]:

• Sca-21 Three Chinese ideograms and numberal 2 surrounding square central hole. Rev: Blank. Red enamelled brass. Plain edge. 26 mm.
• * Sca-22 Three Chinese ideograms and numberal 50 surrounding square central hole. Rev: Blank. Red enamelled brass. Plain edge. 26 mm.
• * Sca-23 Three different Chinese ideograms and numberal 100 surrounding square central hole. Rev: Blank. Green enamelled brass. Plain edge. 26 mm.
• * Sca-24 Three other Chinese ideograms and numberal 500 surrounding square central hole. Rev: Blank. Black enamelled brass. Plain edge. 26 mm.
• Sca-25 Three still different Chinese ideograms and numberal 1000 surrounding square central hole. Rev: Blank. Yellow enamelled brass. Plain edge. 26 mm.
Sca-21 through 25 were reportedly gambling tokens used in San Francisco and Oakland parlors. They were first published in Numismatic Scrapbook Magazine, June 1969, page 982.

I hope this helps with the identification of these pieces.