Mine is also the purple Stag (certificate number in the 130s), found unexpectedly in a giftshop in a Perthshire village - owner stocks Vanguards and Oxford new releases as a sideline to his main business of tourist souvenirs - he only orders one of each, so there's no box of other examples in the back. Which is interesting as 2 specialised model shops in Scottish Central Belt received none of these purple Stags at all against their orders.
A couple of odd quirks - when originally announced in Dec 2015 list for March 2016 launch, the Stag was shown with UEC 603M plates in the advance picture, which seems to be a fake unused combination. It was almost immediately cancelled, with gossip at the time that Corgi did not have licencing permission to use the Triumph name, as a planned red TR250 (TR5 version) disappeared at the same time. This has obviously now been resolved, enabling as well the Monmouthshire Police Herald 1200 panda car.
Its Second Coming now has MVF 604M plates, which seems a genuine match from Corgi's blurb about the particular example and some traceable plate info, although many plate sites are blank. Also it arrived unexpectedly a couple of months early without any particular fanfare - it was due (I think) in May. Early Vanguards arrivals are rarer than unicorns, so its premature appearance may have caught most folk by surprise. The Herald was also a month or two ahead of its predicted release date, so there's a few mice loose in the machinery.