Just wondering if there are any tips on determining how a case is decorated, and how to determine if it is hand engraved, die engraved, engine turned, etc.? For instance, I have this watch I just acquired...it's an Illinois Grade 14, SN 1119004, a 6s, 7j lever set watch (2,000 total made). The 14k (Warranted U.S. Assay) case is decorated with a detailed floral decoration. The case is marked, "J & CO. " (Jeanneret & Co.? Jeannot & Co.? )My untrained eye thinks it is hand engraved ( a complete guess on my part), but what do I know? Some cases even my untrained eye can distinguish as machine applied decoration, but how about cases like this one? An interesting aside, it was sold as a gold plated case, without any good photos of the inside of the case, so I was pleasantly surprised to find the WARRANTED U.S. ASSAY mark! Not bad for a $27 bid! Thanks in advance for any advice!