What would you say is a 'showpiece' ?
Something valuable ? Scarce or rare? Or something you like very much in your collection ?
I have nothing rare, very little that's scarce but I do have two items I like to show to others....special items not only because of what they are, but also how I acquired them.
As a Cinderella collector I can offer these:
The first was the most wonderful Philatelic Gift I have ever been given.

Printed by De La Rue as colour trials for the Jeffrey Matthews colour palette. Sent to all printers of GB stamps. These first turned up in an Amsterdam Stamp Market so Enschede is the likely culprit !

How they got to the open market ? Unknown ?
Banned from being sold on
ebay. Probably 1 sheet of 240 exist for each colour. [17 I believe-will check]
No market value but I was offered a large sum for this by a GB dealer at Stamp Fair in Norfolk,England in 2009.
The second one is from the London 2010 Festival of Stamps. Only 50 exist thus far but others may be offered at a future date.

Printed by Enschede on an old Wooden Intaglio Press at the Guildhall in London in May 2010.
On thick paper from a copy of the original die.
As a Cinderella collector of British Philatelic Exhibition items, I can call this the key item in that collection.
I was offered over 4 times what I paid for it last week during my UK holiday. Of course I declined.
Are these what makes a showpiece though ?

Or does it need to be rare and expensive ? Or just special for the owner? Or maybe one of a kind...Unique ? Not many of those around.
Thoughts?
Londonbus1