You may have heard of the terms Sei-Tacche and Tre-Tacche before. This is Italian for six or three notches (or holes). Therefore, if your Longines case back has three holes it would be a Tre-Tacche case, and if it has six, I’m sure you can guess it.
This particular watch is rare. A Sei-Tacche watch from the 40s with a rare ‘tuxedo’ two-tone dial, featuring a fifth of a second outer track and central seconds is not something you come by every day. The movement doens’t fall behind either: a rare centered seconds 12.68N (the rarer version of the 12.68Z that features sub-seconds).
This is your opportunity to grab a master piece of Longines watchmaking heritage.