Editing 1 gauge (section)

{{Short description|Model railroad gauge}}
{{Infobox model rail scale
| name =Gauge 1
| image_filename = Gauge 1 Diesel Electric Ruston.jpg
| image_caption = Gauge 1 model of a [[Ruston (engine builder)|Ruston & Hornsby]] locomotive
| widthpx = 300px
| scale = {{cvt|3/8|in|mm|1}} to {{cvt|1|ft|mm|0}}
| standard =
| ratio =ca. 1:32
| gauge ={{RailGauge|1.75in}}
| prototype_gauge ={{RailGauge|sg|allk=on|first=imp}}
}}
'''1 gauge''', '''gauge 1''' or '''gauge one''' is a  [[model railway]] and [[toy train]] standard that was popular in the early 20th century, particularly with [[Europe]]an manufacturers. Its track measures {{RailGauge|1.75in}}, making it larger than [[0 gauge]] but slightly smaller than [[wide gauge]], which came to be the dominant U.S. standard during the 1920s.

Gauge one was standardised, according to ''Model Railways and Locomotive'' magazine of August 1909, at {{RailGauge|1.75in}}. An exact 1:32 scale would yield {{RailGauge|1.766in}} for standard gauge prototype. The distance between the wheel tyres was set at {{convert|1+17/32|in|mm|3|abbr=on}} and between the centre of the track 48&nbsp;mm (no inch equivalent suggesting it was metric users' requirement only). The wheel width was set at {{convert|19/64|in|mm|3|abbr=on}}.

Definitions using gauge, rather than scale, were more common in the early days with the four gauges for which standards were adopted being No. 0 (commonly called [[0 gauge|O gauge]] currently), No. 1, [[2 gauge|No. 2]] and No. 3.