I bought a Club Automat Datum just about a year ago, having first seen it in some magazine somewhere. What appealed most was the fact it’s a slightly unknown name and yet still excellent quality. As has been said already the movement is in house and I have to say it has been a pleasure to own. The cordovan strap, again as mentioned above, is gorgeous. Have a read of their website, their history and their place amongst German watch makers is very interesting.
One thing to take note of is the case sizes as they can be large depending on watch and movement (though watches in the same family with different movements vary also).
I wear it daily, love it, you won’t be disappointed. I bought from Wempe in London, great service and in house watchmakers for servicing, recommended.
Drop me an email (in profile) if you want to know any more.