Greenwald 8" hi-securtiy coin box with Sentinel 3 lock. Comes with (1) key. Stainless steal front with short nose to prevent break-ins. Fits Speed Queen. In-Stock. $ ADD TO CART. Greenwald Commercial Laundry Coin Operation Coin Box. In-Stock. $ ESD and Greenwald Coin/Money Boxes Guardian style coin boxes are used on a variety of machines. We recommend measuring the coin.