Great condition: Speedmaster Professional aka "Hesalite Sandwich" or "The Mullet"A relatively rare model that has business in the front (Hesalite) and party in the back (Sapphire display caseback) for those who love the original domed Hesalite crystal and still want to appreciate the iconic 1863 movement inside.  Manufacture date was late 90s and since the discontinuation of the 3572.50, all subsequent exhibition caseback models have had a flat sapphire front crystal.This watch was serviced by Omega/Swatch in September 2022 under warranty and came back restored to a flawless state and in chronometer accuracy range.  The crystal was replaced along with all seals, hands, pushers, barrel, balance wheel, and hairspring. Also vacuum and pressure tested.  This watch is back to nearly- mint condition and ready for many more years of operation. All paperwork and a bag of the replaced parts is included.  It is under an additional 2 year warranty from date of service.  Comes with Omega box, replaced parts bag, and spare links.Reference:31.30.42.30.01.006Let me know any questions.  Thanks for looking!