You are asking about a model, not a specific watch. It's too general a question to answer. It's like asking for an assessment of a corvette. There is no set size or price for a corvette. They have been made for many years, in many configurations, and the desirability and value depend on the specs of any particular example, including the condition.
The Sala book is a great place to start learning, and you can also post specific references you have in mind, or specific watches.
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