scale appeared in Europe. The product line represented North American prototypes in HO scale, using N gauge track. AHM offered two industrial locomotives, a Plymouth diesel and a Baldwin steam locomotive. Hayden & Frary used the AHM trains to model a HOn2½ 3' x 5' portable model railroad called the Elk River Line. The layout appeared in articles starting in the April 1970 issue of Railroad Model Craftsman. The pair built a second HOn2½ layout called Thatcher's Inlet, a 6’ x 30" shelf-type switching layout. It was inspired by the Wiscasset waterfront of the Maine 2-foot railroads. The equipment was based more on available N gauge products than on the AHM MinitrainS line - it reflected the growing variety of N gauge equipment and accessories available in the early 1970s. Next came Dave Frary's 12' x 26' HOn2½ Carrabasset & Dead River Ry (C&DR), one of the first known large model railroad to utilize HOn2½. It appeared in the Nov 1979 and Feb 1980 issues of Model Railroader. In 1974, Bob hayden started his own version of the C&DR. Its first engine was a reworked AHM MinitrainS steamer. The first C&DR road diesels, No. 25 and 26, were based on Minitrix N gauge Fairbanks-Morse switchers. Bob's C&DR was featured in MR’s Great Model Railroads 1991 annual. During the mid-1970s a Japanese company, Sango, made a kit for a 2-6-0 Baldwin engine which showed a great improvement in running ability. This started a growing interest in HOn2½ in Japan. From 1978 to 1982, Joe Works, Sango, and Flying Zoo kits and built-up brass models came on the scene. There was a thriving interest in Japan in 2-footers using N gauge track, as this allowed more HO scale modeling in less space than traditional HO gauge track. Related scales The other NEM defined narrow gauges for H0 scale are H0m gauge (using gauge originally TT scale track) for models of gauge and similar prototypes and H0i or H0f gauge (using Z scale track) for prototypes around – the most popular gauge for industrial (or Feldbahn) railways. In the United Kingdom where the most popular railway modelling scale is 1:76 designated 4 mm scale. The narrow-gauge equivalents to H0e and H0m are OO9 and OO12. For modelling gauge railways – widely used in Ireland and the Isle of Man – a gauge track (as for H0m) is used. For modelling the same track