This is not new, or as mentioned above with Maerklin, confined to O gauge, for decades ago, l got in a zamac cast HO brand then common for steam boiler castings, with the boiler warped into a hump. This was a kit new in the box, from, what l remember as Mantua, from a now gone major New York mail order hobby source widely advertised in the magazines. That was my last order. What IS "zamac"? I vaguely recall that the "z" is for zinc?
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