"Calatrava" as a descriptor for any watch other than specific Patek Philippe references is marketing fluff at best. Nothing wrong with the watch you've posted - case and dial condition are far from a top example, and others may comment on the dial itself as original - not my area of expertise. What I can tell you is that is most certainly not a "military dial" as described by the seller. It's a 30mm case, so very small by current standards. Given all of the above - Price is high IMO for an example in this condition, and especially factoring in the probable need for a service and the $30 shipping cost (from Argentina).