Thanks for the deep insights to your thoughts .... here's the pics on the casebacks:Tudor Submariner Reference 7928 Circa 1960's 200 metres Automatic Divers Watch Original Oyster Case By Rolex Geneva fitted with Rolex Winding Crown. Case #569358 Tudor Movement calibre 390 This watch is in as good as it gets condition. Dial is 10 out 10. Case is 8.5 out of 10. Original not polished with factory sharp edging. Has small engraving in the middle of the case back ("Lawrence") so for all the Lawrence's out there - this may be the watch for you! It can be removed quite easily however, by a skillful jeweler, but I don't think it's necessary. Bezel is very tight and sharp. Bezel insert is in near mint condition. Watch has been recently serviced and keeping good time. The watch currently is fitted with a military type nylon black strap. These early Tudor Submariners ref 7928 are becoming quite rare and collectible, so here is an opportunity for a collector to gain a piece in excellent condition.