Laco just arrived… trying to figure out what model it is. :)

I’ve got several current Laco models but I’m not sure about this “older” one I just picked up.
It has the crown, finish and lugs of the original or pro series. It is 42mm- and 20mm lugs.

It has “Laco by Lacher” on the dial and has a date window. Domed sapphire…

Laco just arrived… trying to figure out what model it is.