In 2015 Sinn released this incredible Sinn 103 in blue with an incredible exhibition caseback, with only 500 produced it sold out quickly and has been desirable by collectors since! I am grateful to be able to bring you one in very good condition with it's full set, I do not doubt this will go quick, especially considering we are pricing very fair for what you are getting! I wouldn't hang about on this one. If you are into nice Chronograph and like Sinn it would be a sin to not get this, ha see what I did there?! Okay... I'll see myself out.