I just listed 8 OBS chips on

Harolds $1000 7th Issue R-4
Harrah's $25 7th Issue R-4
Hotel Elwell $5 1st Issue R-5
Jim's Casino & Saloon $1 1st Issue R-7
Joe's Tavern 50¢ 3rd Issue R-8
Kit Carson Club $25 1st Issue R-5
Las Vegas Club 25¢ 11th Issue R-7
Louigi's Boiler Room $5 2nd Edition R-5

Please take a look.