LONDON - A red phone used by Adolf Hitler to send "millions to their deaths" is to be sold at auction in the United States for a guide price of US$200,000 to US$300,000 (S$280,000 to S$420,000).

The phone, recovered from the Nazi leader's bunker and kept in a box at an English country house since 1945 will be sold later this month (Feb), according to reports.

The phone was presented to Hitler by the German army and was used by him to issue most of his commands during the last two years of World War II, according to a description in the catalogue for Alexander Historical Auctions in Maryland.

Made by Siemens as a black Bakelite phone, it was later painted red and engraved with Hitler's name and a swastika, the catalogue says.

The auction house describes the telephone as "Hitler's mobile device of destruction" and calls it "arguably the most destructive 'weapon' of all time, which sent millions to their deaths around the world".

British officer Ralph Rayner recovered the phone from Hitler's bunker while visiting Berlin on the orders of Field Marshall Bernard Montgomery just a few days after the end of the war, according to Rayner's personal account and shipping documents from that time period, says the auction house.

His son Ranulf Rayner, 82, inherited the phone after his father's death in 1977.

"My father didn't see it as a relic of Hitler's glory days, more a battered remnant of his defeat, a sort of war trophy," he told CNN. "He never thought it would become an important artifact."

Sent to the shattered German capital to establish contact with the Russian forces who had captured the city, Ralph Rayner was probably the very first non-Soviet victor to enter Hitler's bunker, said CNN.

"He could still smell burning flesh," Ranulf Rayner said, recalling his father's description of the underground shelter where Hitler spent his final days. In his words, it was a "dreadful hellhole".

First offered the black telephone found in the room of Eva Braun, Hitler's bride, Ralph Rayner instead chose the red phone next to Hitler's bed.

"He told the Russians that red was his favourite colour," Ranulf Rayner said, "which the Russians rather liked."

In a letter to his wife Elizabeth on May 18, 1945, Ralph Rayner wrote of the "utter horror" he witnessed in Berlin, but did not mention the remarkable souvenir he had in his possession, said CNN.

If British soldiers were caught looting from the Germans, Ranulf Rayner explained, they would face a court martial.

Ralph Rayner returned to Devon in western England with both the phone and a porcelain model of an Alsatian, also taken from the bunker, hidden in his suitcase.

The china dog, made by slave laborers at Dachau concentration camp and probably presented to Hitler by Heinrich Himmler, SS chief and architect of the Final Solution, is also due to be auctioned.

"It's a pretty nasty thing, just as sinister as the phone," Ranulf Rayner told CNN.

He hopes these objects will be bought by a museum, rather than a private collector, the broadcaster reported.

"I don't want them to be hidden again," he said. "I want them to remind the world of the horrors of war."

The auction house estimates the phone will be sold for US$200,000-US$300,000 and the Alsatian figure for US$25,000-US$35,000.