Rolex cellini king midas query

[Judith]

Can anybody help me out on a watch I have inherited it is one of the few left handed winding models made It’s a Rolex Cellini King Midas from 1974 and has a 19J caliber 1600 manual wind movement. The 18K white gold ribbed case is in excellent condition. The case back has the Rolex crown symbol along with case number and Swiss quality stamp. The case measures approximately 29mm top to bottom, 29mm at the widest point tapering to 27mm. The watch has its original dial, crown and buckle. The original asymmetrical strap is crocodile but it shows some damage due to wear on the back side at the end where the holes are.
I am looking to sell the watch and need some advice on how much it is worth in euros……any ideas.?? Thanks in advance Judith