Lo'

Good morning everybody! Very new to all this but I have been lurking in the shadows for a while. Now I feel ready to take the plunge and would like to begin with my "grail": A vintage Rolex Explorer I with tritium dial. Anyone can recommend a maker? I see that there is a post from a fellow countryman (Accio) which has bought from this "jmb" but I cannot seem to find any trace of a seller by that name in the forum. Any pointer will be appreciated. Thanks in advance Have a great weekend Lorenzo