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	<id>http://staging.tcsdcc.com/index.php?action=history&amp;feed=atom&amp;title=Category%3AHO-Scale</id>
	<title>Category:HO-Scale - Revision history</title>
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	<updated>2026-05-13T14:04:40Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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		<id>http://staging.tcsdcc.com/index.php?title=Category:HO-Scale&amp;diff=3957&amp;oldid=prev</id>
		<title>Tcsdcc: Created page with &quot;HO or H0 is a rail transport modelling scale using a 1:87 scale (3.5 mm to 1 foot). It is the most popular scale of model railway in the world.[1][2] The rails are spaced 16.5...&quot;</title>
		<link rel="alternate" type="text/html" href="http://staging.tcsdcc.com/index.php?title=Category:HO-Scale&amp;diff=3957&amp;oldid=prev"/>
		<updated>2019-12-13T18:55:48Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;HO or H0 is a rail transport modelling scale using a 1:87 scale (3.5 mm to 1 foot). It is the most popular scale of model railway in the world.[1][2] The rails are spaced 16.5...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;HO or H0 is a rail transport modelling scale using a 1:87 scale (3.5 mm to 1 foot). It is the most popular scale of model railway in the world.[1][2] The rails are spaced 16.5 mm (0.650 in) apart for modelling 1,435 mm (4 ft 8 1⁄2 in) standard gauge tracks and trains in HO.[3]&lt;br /&gt;
&lt;br /&gt;
The name HO comes from 1:87 scale being half that of O scale, which was previously the smallest of the series of older and larger 0, 1, 2 and 3 gauges introduced by Märklin around 1900. In most English-speaking markets it is pronounced &amp;quot;aitch-oh&amp;quot; and written with the letters HO today, but in other markets remains written with the letter H and number 0 (zero), so in German it is pronounced as &amp;quot;hah-null&amp;quot;.&lt;/div&gt;</summary>
		<author><name>Tcsdcc</name></author>
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