The landmark is being marked in grand style with the whole of the glass frontage of the Rocester World HQ encased in a giant graphic marking the achievement.

Nestled behind the glass in the reception area is the actual one millionth machine, a 22 tonne JS220 tracked excavator in shimmering silver.

JCB Chairman Sir Anthony Bamford said: “It’s taken JCB more than 67 years to produce its millionth machine.

“Incredibly, one third of those machines has been produced in the last six years.”

He added: “Reaching the million milestone is the result of a huge effort by the JCB team past and present and it’s an achievement everyone can be justifiably proud of. Given our continuing growth, JCB’s two millionth machine will be produced in considerably less time.”

More than 2,500 JCB dealers and customers will be joining in the celebrations in the next five weeks as the company embarks on the next phase of its global growth programme by staging the biggest ever product conference in its 67-year history.

The event in Staffordshire is showcasing all the latest machines in JCB’s construction, agricultural and industrial ranges.

JCB CEO Alan Blake added: “The global dealer and customer conference is the biggest in JCB’s history and unveiling our latest product innovations to delegates will be a key driver for our future growth.”

The manufacturer has booked a total of 4,700 hotel room nights for delegates from almost 130 countries during the conference as it demonstrates more than 100 of its innovative machines.