O-Sho-Me (Ontario Society of H.O. Model Engineers): Canada, nd. Item #98-8654
Each issue illustr with schematics, 11 x 8.5, stapled self wraps, six leaves printed on rectos only, covers a bit worn and soiled, staples rusty, contents used but still nice. Editions 9, 10, 13, 14, 16-18, 25-29. Scarce.