I am thinking of purchasing the attached for 600eur.
Omega jumbo 266 cal 2505-7.
I have been told that dial hands and movement are original, crown is original and backs is original.
I have been told that dial hands and movement are original
Good thing you were told so - for us it鈥檚 hard to judge, given the lack of any pictures from the front. 馃槈 Only thing I can tell you from what you posted is that whoever owned it before didn鈥檛 seem to have treated it particularly well.
I think I wouldnt have rated this condition "good". The water damage alone on the dial near the crown. Also, the second hand looks a little long for the crosshairs, polished case... Avoid this one.