Hi, can anybody tell me more about this 1940´s (my estimation) screw back bullseye? In Longines language we would call it a sei tacche
Thank you for all information! It is 33mm and I personally like the unusual dial.

 

I think it's a nice watch you have there, but I don't understand why you think it should be called Bullseye?

The so called (Suverän) Bullseye doesn't have a central second. It looks like this:

 

Thank you for sure my mistake - I thougt bullseye did refer to the style of dial

 

Well, there is no separate model called a "bullseye" as you say, but there should be an inner white part as in @OMEGuy's photo.

I like these cal. 23.4 watches, especially when they are in a case with a spacer like the one you show.

 

"Bulleye" is a dial style but not yours. Nice watch.