Case manufactures have previously provided accurate information on Apple’s future devices, though not always. Every year we see next-generation cases emerge for unannounced hardware, however, and this year is no different. Case manufacturer Chinee has already begun selling third-generation Apple iPad cases, but the company is calling them iPad 2S cases rather than iPad 3 cases according to 9to5Mac. Apple is expected to release its third-generation iPad tablet in March, which has been rumored to feature a slightly thicker case to accommodate a 4G LTE radio, a quad-core processor, a 2,048 by 1,536-pixel HD display and twice the battery life as the current iPad 2. Chinee said the company’s iPad 2S cases are designed to fit a tablet that is 1MM thicker than the iPad 2, which aligns with previous reports. The case maker also claims the design knowledge came from sources within Apple’s supply chain, which is certainly a possibility now that the Cupertino-based company has already started production.