Thanks for the information, efauser! I have found though, that the first cited reference does not handle Ross cases, or I am not capable of using it properly. I have an Omega 550-based Seamaster Deville and the case "LL...." can't be handled as I suppose this database draws from Omega-cased watch records, not those cased by Ross in the US. If there is a Ross-incorporating database, it would be helpful, but in the interim the movement serial has sufficed.
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