White gold day date 1803

[smokingaces]

Hi Folks

Have just purchased a 2nd hand wg day date 1803, and am trying to find out a little more info on the watch.
Have been collecting Rolex for a few years now but am by no means a expert, in the pass have owned a few yellow gold day date on president straps and 1 white gold on leather strap.

What makes this wg day date different, its on a 18k wg jubilee strap, have search the net for hours but can not find any pics or info on this. So just looking for somemore info.

Sorry also forgot the case number is 380**** so about 1973/74

all info would be welcome

Thanks
Luke