It has been long believed that the Oberth-class ship seen in DS9 "Emissary" is the USS Bonestell described in the Star Trek Encyclopedia with registry NCC-31600. However the Encyclopedia always implied the Bonestell was seen in TNG "Best of Both Worlds Part II" and not "Emissary". On the other hand there is no evidence that an Oberth-class vessel was ever used in the graveyard scene in BOBW2. Recently, an internal TNG ship list was unearthed and published on the trekdocs Twitter account. https://twitter.com/trekdocs/status/846068126181666817/photo/1 This list dated September 26th, 1990 was compiled around the time of BOBW2, so many years before "Emissary" was filmed. It looks genuine, and although the author is unknown it was likely drawn up by Mike Okuda (possibly for the production technical manual) and predates the first Encyclopedia. Among many interesting tidbits, the list has the USS Bonestell complete with class and registry. All the other ships from BOBW2 are also on the list. What this finding implies is that the Bonestell had a physical model as early as BOBW2 that someone (Mike Okuda?) recorded on the list and that may or may not have been filmed and/or made the final cut. The screencaps of BOBW2 have been thoroughly analyzed before, and most of the wreckage has been identified and linked to known physical models. Looking for a possible Oberth-class model among the few unidentified pieces of wreckage, there may be a possible match. http://www.ex-astris-scientia.org/articles/wolf359/wolf359-1-2a.jpg The topmost unidentified ship in the Ex Astris Scientia screencap linked above looks like it might be an Oberth-class saucer with possibly a matching secondary hull, but no obvious nacelles. Given the distance, lighting and blurriness, it's a long shot at best but could explain why someone identified the USS Bonestell as early as 1990, way before "Emissary" was filmed. Does it seem plausible that there was an actual piece of wreckage identified as the Bonestell in BOBW2? Was the Oberth in "Emissary" actually modified with "Bonestell" markings, or was it just the USS Yosemite from "Realm Of Fear" ? Looking forward to your thoughts.