Longines Weems and Lindbergh Hour Angle watches

Does anyone know when these two watches were first offered for sale to the general public? I have a 1930 Longines catalog, and neither watch appears for sale in that catalog -- only a few chronographs (still the one-button variety). I then have a 1937 ad from JCK showing both of the watches for sale in wooden presentation boxes. Could this have been the first time they were offered for sale? Seems possible since this was the 10th anniversary of Lindbergh's historic trans-Atlantic flight. But I'm not sure. Anybody have any catalogs between 1930 and '37 showing either or both of these watches for sale? Or any other information gleaned from reliable sources? Thanks.

This is for my next Bulletin article on Longines.