Having an interest in issued watches, I naturally jumped on this one when it came along. The owner was a Royal Navy diver who also had in his possession nos 001 and 007 (he wouldn't sell these!) of an edition of 150. The watches were commissioned by the unit and have an exceptionally beautiful logo on the caseback which is protected by a saphhire crystal. The watch itself has a nice blue dial although I think black would've been a better choice. Nevertheless, I think it goes well with the RN SM300 and has a special place in my collection.