So far as I know, in its last days of dealin' the Lucky Derby was using its green 50¢ chips as drops. Sort of a local custom around the Sacramento area, Casino Royale was doing the same. Never saw a $4 from Lucky Derby and I sort of recall that I once asked the cashier if they had any and he said no. But it was kinda late at night and I cannot say if that "no" meant, no none existed, or no as in no, I can't sell you one. Lookin' forward to seeing what is discovered!