Originally Posted by
randyjawa
You can easily determine
How Old Your Bike Is by applying the information contained there-in, paying closest attention to
Component Numbers.
Hope this is a help and lovely bike you have there.
The OP already knows it is a 1991 De Rosa.
You will need much better photos, taken outdoors with a neutral background and limited shadows. Also I would install the original wheelset beforehand and sell the new wheels seperately.