1975 Greco EG-1000
The Pinnacle of Greco EG Series
With regard to dating, this guitar doesn't have serial number printed either on headstock or inside the f-holes, which implies the guitar was manufactured before 1976. Then I looked at the pickup serial number 15923 and got an idea from the second digit 5 that the guitar was manufactured in 1975.
Speaking of the condition, you may see a bit of discoloration, scratches, rusty metal but none of them are remarkable. Enough rooms for adjusting trussrod (if ever needed). Sound check all ok. This guitar will be delivered to you with a gig bag.