I'm looking for a Longiness with the Flying Cloud Clipper Ship on the back. I can't seem to find information about which references or collections feature it. I found these two for sale as examples with the medallion back I'm looking for, but not sure if they are only for this reference only. It's listed as Longines Flagship Ref. 3418 "Big Ship" 9k Gold, 1967 https://timerediscovered.com/en-us/products/longines-flagship-ref-3418-big-ship-9k-gold-1967 Also, found another one here, described as: Collection: Flagship Model Name: Three Stars Reference Number: 3418 https://www.therealreal.com/products/watches/strap/longines-flagship-three-stars-watch-inhrs? Both are pretty expensive. I wonder if there is a GF'd version for less? Are they rare? I can't find one on Ebay.