I am trying to update the Flieger Section of OTD, and call your attention to these two.

• on the top, the earlier version: one-button model; seems to be entirely original (though logo on the dial looks a bit odd); hinged back; "cathedral hands"; dial shows black paint giving way to brass . . . amazing patina, when you see it in the metal.

• on the bottom, the later version: two-button version; looks NOS, if that is possible; snap-back . . . stunning!!