The San Juan Model Co. On3 TO-1935-35 Conoco Tank Car CONX #35 is a vintage replica of a 1926 Conoco Tank Car painted in 1935 silver color. This pre-built model is made of plastic and is in C-10 Mint-Brand New condition. With a scale of 1:48 and a gauge of On3, this tank car is a great addition to any model railroad collection. The two-rail system and transportation theme make it an exciting piece for enthusiasts aged 17 years and up. Made in China by San Juan Car Co., this tank car captures the charm of a bygone era in railroads.