No, that is not the generally accepted understanding. Omega did not make 2 different cases for the same watch. These are long and thin lugs. With fixed bars for military watches. Spring bars can brake .There was no need to manufacture the same thing in 2 different production lines . Not for that kind of money. These watches were never constructed to function 80 years later. Why add the permanent horizontal stress of an spring bar to the vertical stress of the wear , strapped to your arm? These are very thin and long lugs made from a brittle material. There is no second order form for a different case shape at the factory. We tried to dig one out with John Diethelm in the 90's. Nothing there. Different issued nominations in the UK. But not from the Factory. Kind regards. Achim