'I've been on a calendar but I have never been on time', said Hollywood actress Marilyn Monroe years ago.

It's heard that Monroe had a huge collection of expensive watches, some costing thousands of dollars.

All cannot afford a watch priced that high but any information on it makes an interesting piece to read.

We present here a list of world's 10 most expensive watches.

1. 201-carat Chopard
Price: $25 million

It's made of 15 carat pink diamond, 12 carat blue diamond and 11 carat white diamond.

In addition, there's 163 carat diamond surrounded by white and yellow, so that is a total of 201 carat, as the name of the watch.

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2. Patek Philippe's Supercomplication
Price: $11 million

It is an 18 carat gold pocket watch made in 1932.

It was produced in 4 years.

This watch is booked by New York banker Henry Graves, Jr.

This watch set a record for pocket watch in the year 1999 when it was sold by auction.

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3. Patek Philippe's Platinum World Time
Price: $4 million

This watch became world's most expensive watch in 2002 when it was sold for $4 million in an auction.

The special thing about this watch is that displays a 24-hour time zones in different countries, and it's very easy to read.

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4. Vacheron Constantin Tour de l'Ile
Price: $1.5 million

Vacheron Constantin Tour de l'Ile is considered one of the most complex watches ever made by human.

Its made of 834 parts with over 10.000 hours to be produced.

The watch has two faces, which shows the same time, its case is made of gold.

Only seven units of this watch is produced all over the world.

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5. Patek Philippe Sky Moon Tourbillon
Price: $1.3 million

Patek Philippe Sky Moon Tourbillon is a very expensive watch because its made from 688 parts.

The case is made of platinum.

Only two pieces are produced a year, a series of platinum and another of rose gold.

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6. The Chopard Super Ice Cube
Price: $1.1 million

It's called Chopard Super Ice Cube because its shape is just like an ice cubes.

This watch is made of package of gemstones.

The gemstones are 66 carat.

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7. Hublot Black Caviar Bang
Price: $1 million

The case is made of 18 carat white gold combined with 322 grains of black gems included in the belt section, that makes a total of 25 carat gold.

It's only one piece in the world.

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8. Louis Moinet Magistralis
Price: $860,000

This watch is made of 2000 years meteorite and it's case is made of 18 carat gold.

Scarcity of moon meteorite is the main reason that this watch is so expensive and it won't be produced repeatedly.

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9. Blancpain 1735 Grande Complication
Price: $800,000

Blancpain 1735 Grande Complication is a very luxurious watch, its case is made of platinum.

The strap is made of crocodile skin and the engine component consists of 740 handmade parts.

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10. Breguet pocket watch 1907BA/12
Price: $734,000

Breguet company was founded 225 years ago, one of the oldest watch companies in the world.

Breguet is now part of the Swatch Group Company. Pocket Watch 1907BA/12 is a luxurious watch, which is made of 18 carat gold.