I just got the attribution back from Dennis at TR King.

Richard, The blue EMC chip is from the El Morroco Club, 1332 E Street, Las Vegas, NV, year 1958. The green $25 chip is from the Normandie Club, 114808 Western Ave., Gardena, CA, year 1945. Sincerely, Dennis
Dennis O'Neill

I just recently purchased this chip and can't wait to get my paws on it
Hava Good One, Richard