Yes, Wuff is correct.
Trouble with the catalogue is that the weight is indexed only as "Crown" rather than "HRH ..." or "Royal ..." etc., as was usual for other Royal Commemoratives. This also applies to a similar Crown weight for a 1981 Charles & Diana Royal Wedding Collection issue, (but not made by Jack Allan).
Both Crown weights were listed in the first edition of the catalogue (1999). The details and suggested "values" in both editions are identical for the Jack Allan weight, suggesting no real increase over the 5 year period.
The figures for the 1981 C & D crown weight (fully subscribed edition of 250) were:
Original Issue Price £58.50 / US $295.00,
1999 Value £100.00 / US $295.00
[seems odd that it increased in £ but not in $
- maybe a typo or could it have been the effect of exchange rates?]
2004 Value £200.00 / US $400.00
So, the Ann & Mark weight seems to be the one to go for in terms of greater rarity and possibly better investment value. But I'd like
to have it because of the provenanced connection to Jack Allan - of whom very little is recorded in the paperweight literature.