Help buying Rolex vintage watch 1803 DD

[kalinx]

Hi everyone, Im new to vintage watches and am keen to get one for my birthday. The missus is treating me (with some personal savings) Im keen on the daydate 1803 with a leather strap.

I have seen this one on Chrono24 and would really appreciate an expert to have a look at the pictures and advise on condition and price.

http://www.chrono24.com/en/rolex/day...arch/index.htm

Is there anything I should be looking out for in particular?

Many thanks all,

Luke