The black day/date wheel is a paticularly nice touch.
Not familiar with this one.. what reference and vintage is it?
Well thanks. This is a 356 Fliegler II Sa display back purchased new in 2007, a recent purchase from Al (Archer). I don't think Sinn does the case reference thing but this watch is still available and in a few different iterations, with or without display back and a choice of sapphire or acrylic crystals.