Got £350,000 to £450,000 ($456,400 to $86,800) to spare and are a massive Leica fan? You're in luck then as the famous 'Stammbaum' (family tree if your German's a little rusty) is up for auction with Christie's in London.Leica's rich and illustrious heritage is known the world over and anyone who ventured to the company's HQ in Solms, Germany, would...