This is the actual watch used in the 1953 advert, said by Smiths on the original expedition receipt to have been chosen by the team, as usual there are some differences, the hands are straight not the dauphine ones sometimes found excellent investment if you want a near as possible model to the advertised one. 33mm Dennison case with the full Dennison Aquatite logo on the back. Serial number 73878. Excellent 12 ligne 15 jewel c series movement, with frosted gilt finish, balance with screws, flat hairspring, straight line one piece click and click spring. Cruciform dustcap/movement shock-proofing ring. Chromed top steel screw in back. Fully overhauled to a high standard, keeps good time. Dial has a photographic shadow which is not present on the watch.