You are either over 53 or your dad has/had one. This bracelet was "the bracelet" for frogs, SF types and those loveable Marines. Available from various sources outside of Subic Bay in the P.I. Mine was worn on my issued Tudor. Now I see a guy has brought them back. They look really nice, but I haven't purchased one from him....yet.
If you have a Submariner, Heuer 844, Benrus or Bill Yao, or other dive watch, you might consider this for a change of pace. If nothing else, it is a cool conversation starter and if you were in Vietnam, you will likely remember them. I would love to hear from anyone else who had one or see your pics.
Hope its ok to post the site.