I'm trying to decide which of these two is a better fit for my collection. I already own a Laco A-dial flieger and a couple of flieger-style watches in the Damasko DA35 Black (no numerals, white dial) and DA36.
In favor of the Stowa, I've always liked the grey dial of the Ikarus as it is very unique, and I don't have a grey dial in my collection. I also like the domed sapphire crystal.
On the other hand, although I don't find many Sinns appealing, I love the simple no-numerals dial of the 556. It also comes with a TOP grade movement and would be my first Sinn.
My wrist is 6.75" so either watch is a good fit (Sinn 38.5mm case, Stowa 40mm). The Stowa has better lume, but lume is not a priority.
Looking forward to any impressions of these two, considering what I already own, that might help sway me one way or the other. Thanks