By 1967, Fiat was leading the European market, and its 50th anniversary was coming up. For the occasion, a new series was developed in Turin with more innovative characteristics than earlier models. The new series would be based on the Diamante series, and the name chosen was "Nastro d'Oro" or "Gold Ribbon", marking the "Golden Anniversary" of Fiat's "marriage to the land".

The appearance was a strong evolution of the Diamant series, again penned by Pinninfarina, with the longitudinal ribs of the engine cover now more predominant, and running though to the nose conferring lightness and movement. The colors were slightly changed as well, with a lighter orange for the bodypart, and blue for the mechanical parts, which gave the impressions of a dynamic and modern machine. 

The new series wasn't only a styling exercise though. The series introduced new upgraded engines, all now with direct injection and rotary injection pumps, and all but the smallest reverting to a stressed crankcase design. Improved driving ergonomics, a number of new safety features including a lock preventing starting the engine while in gear, new 12 volt electrical system, upgraded gearboxes with synchronizers, and the control-matic three-point hitch now standard on all models, are just a few of the technical features to mention.

Some sources tell, that all models at launch had the option of a Frutteto, Vigneto and Granluce variant, though this has been difficult to confirm.

The first models of the "Nastro d'Oro series"/"Gold Ribbon series", were put into production in 1968.

The 250 and 300, were the smallest tractors in the series, and would be the last iteration of the legendary "La Piccola", which was first seen in 1957, having been in production for 21 years when the last Fiat 300 rolled of the assembly line in 1978.

It was sold in Italy and internationally as the Fiat 250 and Fiat 300, but in France it was still sold as the Someca 250 and Someca 300. Someca being the agricultural arm of Fiats French subsidiary Simca.

The 250 and 300 were constructed using a box section steel frame. In one end attached to the gearbox and differential casing. The other end would split into two half's and embrace the engine, while resting on the front axle.

The gearbox was a six forward and two reverse, and had PTO and locking differential on the rear axle as standard, as well as an extra mid-mounted PTO on the standard 250 and 300, designed for mid-mounted mowerbars.
As a new addition to the "La Piccola" platform, the model could now be had with draft control/"Control-Matic".

The 250 used the two cylinder watercooled, but now direct injected diesel engine, with a bigger displacement of 1.559 cc, developing 25 hp at 2.250 rpm and 92 nm at 1.600 rpm.
The 300 used the same two cylinder watercooled direct injection diesel engine, but with an even bigger displacement of 1.727cc, developing 31 hp at 2.300 rpm and 106 nm at 1.600 rpm.

The Gold Ribbon Series tractors enjoyed even greater success than its predecessor, being recognized for their new design, engines and features.
In 1968 alone, when the European market was contracting, Fiat produced a total of almost 60.000 tractors, 42.000 of which in Modena alone, 5.000 more than the previous year. That year also saw the production of the 500.000th Fiat tractor since 1918.