Seven outfits worn by Margaret Thatcher during the 1970s in the early part of her career are being auctioned at Christie’s on Monday.

They form part of its London Sale, which is being held to celebrate the Queen’s Diamond Jubilee and London 2012.

Sold by a private collector, the suits which come in an array of colors, are thought to be the first of Lady Thatcher’s clothes to be sold at a public auction.

All of the Iron Lady’s outfits have been given a guide price of between £1,000 ($1,600) and £1,500 ($2,500).

Pat Frost, Head of the Textiles Department at Christie’s told the BBC: “These outfits were worn at the beginning of her career, when she got the <<milk snatcher>> tag, and were part of important moments like her introduction as leader at the Conservative Party conference.”

She said she was not aware of any previous auctions of Lady Thatcher’s outfits.

Last year Lady Thatcher’s black Asprey rectangular leather handbag sold for £25,000 ($39,000) at auction.

She was said to deploy it to enforce cabinet solidarity.

The term “handbagging” was used as a reference to the way she disciplined unrurly Tory backbenchers and ministers during her years in Downing Street.

Seven outfits worn by Margaret Thatcher during the 1970s in the early part of her career are being auctioned at Christie's on Monday

Canary yellow dress

This was worn to the Conservative Party conference in 1975 and Lady Thatcher can be seen wearing it in contemporary news footage, standing alongside Edward Heath on the conference platform.

Navy dress

Margaret Thatcher can be seen in the navy suit during a Valerie Singleton programme.

Peach wool suit

This outfit she wore while being grilled about moisturiser by Sue MacGregor in 1971.

Light green suit

This was worn when she was confirmed as the new leader of the Conservative Party .

Navy suit

Margaret Thatcher is seen wearing the navy suit in an episode of Val Meets the VIPs, which was presented by Valerie Singleton.

Green suit

Margaret Thatcher wore the green suit in a 1972 edition of Panorama called Women in Politics.