It’s not often you get an opportunity like this...

Today is one of those days that I am genuinely excited to be in the office.

The reason? Today I can share a show-stopper with you. I'm often accused of eulogising about the pieces we unearth for you but you'll understand why I'm not holding back about this item in a moment.

It does help being the most renowned collectibles brand in the world in that we get buying opportunities simply not open to others.

That's why today I am offering you the chance to own something composed and handwritten by one of the greatest classical composers of all time - Wolfgang Amadeus Mozart.

For many, Mozart is the pinnacle of classical music. A child genius, he started composing at the age of 5 and went on to create hundreds of magical pieces and revolutionise the music of his day, inspiring future greats like Beethoven and Wagner.

Few other composers capture the imagination like Mozart does, the passion, the beauty, the delicacy, the soaring melodies and then the lightness of touch. And there's a multi million-dollar industry to prove it.

Undertake the most basic of internet searches and as well as a multitude of different recordings of his music, you'll find all manner of Mozart souvenirs from golf balls to chocolate bars and even salt shakers.

However, you won't find what I am about to share with you because (due to his early and untimely death) anything written or signed by Mozart is extremely difficult to obtain.

Late last year, collectors were given a rare chance to obtain a Mozart manuscript when it was offered at auction having been hidden away for over 150 years. The item, a transcription of Haydn by Mozart, sold at Sothebys for £121,000.

Mozart memorabilia is in the premier league of collecting and investing. It is rare to find important pieces for less than £100,000, as recent auction results attest.

In the last four years, I can find three examples of a Mozart manuscript being sold. The prices achieved? £103,000, £111,000 and, most recently, £145,000.

2006 saw Mozart's 250th birthday and the celebrations took place all around the world - starting in Sydney Harbour there were dedicated recitals staged in Moscow, Prague, London, Tokyo, Havana and New York among many other cities. Salzburg, birthplace of the classical music genius, was the epicentre of the celebrations with an all Mozart concert, street parties and even a giant birthday cake.

Public affection and critical acclaim for Mozart is as high as ever. Couple this with the fact that there is a serious shortage of Mozart memorabilia available and you can understand why people are paying such big sums for pieces. Despite his prolific music production, Mozart died tragically young (and impoverished) at the age of 35. Furthermore, a lot of pieces are in private collections or belong to museums, so the smart money is on securing quality Mozart manuscripts if you can.

This is the first time we have ever been able to offer you such a piece.

It has taken us long enough, but I think you'll agree that it has been worth the wait. You see, the manuscript we have available to you is very special. It is probably the most exciting Mozart piece to become available on the open market for over a decade.

You have the chance to obtain a working manuscript from Mozart. The item is an autograph manuscript of Mozart's Serenade in D major, K. 185 ("Antretter").

Mozart manuscripts are very hard to obtain and this particular example is in near perfect condition. It comes professionally bound in a custom made navy presentation case.

Serenade in D major, K. 185 ("Antretter") was composed by Mozart in 1773. It is believed that it was composed, originally as an orchestral serenade, as a salute to a family friend, Judas Thaddäus Antretter, who was completing his fourth year at Salzburg University.

Mozart set the work in the key of D as he did years later with the famed Prague Symphony, giving it a bright tone. The finale is a wondrous thing. Mozart tosses off brilliant modulations and convoluted phrasing which, as always, resolve perfectly.

Enjoy some of it for yourself here - http://www.youtube.com/watch?v=bG84khqreQQ

To give you a few examples of price realisations, another page of the Serenade in D major sold ten years ago for over £80,000 and an original manuscript of the finale of Mozart's Marriage of Figaro fetched £751,000 nine years ago.

Mozart's score of K. 185 contained 58 leaves, of which the present manuscript is leaf 17.

The working manuscript contains bars 40-53 of the second movement 'Andante' and is leaf 17 (of 58) from the now dismembered manuscript of K. 185, notated in brown ink on eight staves per page, with a few minor corrections and revisions.

The whereabouts of the other pages are not known and make this example a very rare item indeed.

This is a special opportunity to own a portion of a working manuscript by one of the world's greatest composers. It is available to you for £150,000.

If you would like to declare your interest in this exciting and potentially once in a lifetime opportunity (payment options are available), please call my team at Fraser's Autographs on +44 (0)20 7836 8444 or email sales@frasersautographs.com.

So many Mozart pieces are held in institutional collections as they look to build up as complete a collection as possible. Today, you could join the tiny few of private individuals who can say "I own something that was personally worked on by Mozart".

I'll be sad to see this piece go, but it belongs in the collection of a true enthusiast and smart investor who will treasure it. Could that person be you?

If it is and you want to discuss payment options, just call +44 (0)20 7836 8444 or email my team on sales@frasersautographs.com

Best Wishes,

Keith Heddle Investment Director Stanley Gibbons Group Plc