Micro Ace - A7800 - Locomotive, Steam, 4-6-2 - Japanese National Railways

Prototype History: Under the Whyte notation for the classification of steam locomotives, 4-6-2 represents the wheel arrangement of four leading wheels on two axles, six powered and coupled driving wheels on three axles and two trailing wheels on one axle. The 4-6-2 locomotive became almost globally known as a Pacific type. The type is well-suited to high speed running. The world speed record for steam traction of 126 miles per hour (203 kilometres per hour) has been held by a British Pacific locomotive, the Mallard, since 3 July 1938.

The introduction of the 4-6-2 design in 1901 has been described as "a veritable milestone in locomotive progress".[3] On many railways worldwide, Pacific steam locomotives provided the motive power for express passenger trains throughout much of the early to mid-20th century, before either being superseded by larger types in the late 1940s and 1950s, or replaced by electric or diesel-electric locomotives during the 1950s and 1960s. Nevertheless, new Pacific designs continued to be built until the mid-1950s.

The type is generally considered to be an enlargement of the 4-4-2 Atlantic type, although its prototype had a direct relationship to the 4-6-0 Ten-wheeler and 2-6-2 Prairie, effectively being a combination of the two types.[4] The success of the type can be attributed to a combination of its four-wheel leading truck which provided better stability at speed than a 2-6-2 Prairie, the six driving wheels which allowed for a larger boiler and the application of more tractive effort than the earlier 4-4-2 Atlantic, and the two-wheel trailing truck, first used on the New Zealand 2-6-2 Prairie of 1885. This permitted the firebox to be located behind the high driving wheels and thereby allowed it to be both wide and deep, unlike the 4-6-0 Ten-wheeler which had either a narrow and deep firebox between the driving wheels or a wide and shallow one above.

From Wikipedia

Road Name History: Japanese National Railways (日本国有鉄道 Nihon Kokuyū Tetsudō), abbreviated Kokutetsu (国鉄) or "JNR", was the business entity that operated Japan's national railway network from 1949 to 1987.
By 1987, JNR's debt was over ¥27 trillion ($280 billion at 2009 exchange rates) and the company was spending ¥147 for every ¥100 earned. By an act of the Diet of Japan, on April 1, 1987 JNR was privatized and divided into seven railway companies, six passenger and one freight, collectively called the Japan Railways Group or JR Group.

From Wikipedia

Brand/Importer Information: Micro Ace Co., Ltd. is a railroad model / plastic model maker headquartered in Suzaki, Saitama Prefecture.
Founded in 1963 as Arii Manufacturing Co., Ltd. (Arii), the company produced plastic models. In 1980 it entered the N-scale model train business and withdrew after a while. It reentered N-scale model train in 1996, with production in China.

On 10th June 2004, this business was transferred to the newly established subsidiary Micro Ace Co., Ltd., and "Micro Ace" became the new company name.

Read more (in Japanese) on Wikipedia.