Some of the finest combine harvesters!

Powered by the Perkins A4.300 direct-injection, four-cylinder engine, the MF 410 featured six straw walkers and was available with table sizes of 8½ft, 10ft and 12ft. Front tyres were 15-26 and rears were 6.50-16. List price in December 1967 for the smallest model was £2,855, while a hydraulically-folding discharge auger added £35.

Massey Ferguson’s medium-acreage model of its so-called ‘Big Four’ combines was marketed with the strapline ‘upper bracket performance – middle bracket price tag’ and, with the model starting at £3,100 (June 1968), it certainly offered a lot for your money. With increased straw-walker area over its predecessor, and MF’s exclusive ‘Double Action Separation’ system, this machine certainly delivered on all fronts.

The MF 510 initially came in Standard and De-Luxe forms – but, by July 1970, this had been condensed to a single variant with the choice of four tables, from 10-16ft. With three forward gears and one reverse, operated by a steering column-mounted lever, the 510 had a list price of £4,075 – with automatic table height control (10ft table), plus road and field lights as standard.

Largest of the ‘Big Four’, the MF 515 was capable of an output of 10 tons per hour. Features included 45in (1,140mm)-wide and 22in (560mm)-diameter cylinder, fully-adjustable concave, six straw walkers with an overload warning and a variable-speed fanning mill. List price (July 1970) for one of these combines with a 16ft table was £4,425.

Fitted with a 104hp Perkins A6.354 engine, the MF 525 Super II had a list price of £23,365 in June 1980, when equipped with a 10ft table. The optional Power-Flow tables ranged from £1,950-£2,100. The combine featured six straw walkers and grain tank capacity of 3,020 litres (83 bushels).

This shot purportedly shows the MF 515 on display at the 1968 Royal Smithfield Show.