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<p>That advertisement is very interesting as it shows the Champion
Open Center tire and the Champion Spade Grip at the bottom, but
the tractor in the picture is not wearing either one. The
Champion Open Center in the lower picture appears to be the 23
degree tire in the early production, and it looks to be a multi
angle tire as the lugs appear to curve. I would guess that the
Open center became the 23 deg angle tire later in their
advertising campaign. <br>
</p>
<p>Cecil<br>
</p>
<div class="moz-cite-prefix">On 4/20/2019 10:27 PM, Ralph Goff
wrote:<br>
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<div class="moz-cite-prefix">On 4/18/2019 11:12 AM, Indiana
Robinson wrote:<br>
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<div>I can't pin down the date but we acquired my 1947 Farmall
Cub in the late 1960's and it was wearing a "very weathered"
pair of Firestone Field & Road (23 degree) tires on the
back of it. It now wears a pair of turf tires and has for
many many years.</div>
<div>I was thinking that I started seeing the F&R's about
the mid to late 1950's. That memory may be a bit slushy.
:-)</div>
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<p>I have this vintage ad from 1953 showing Firestone tire's
selection of tractor tires. No mention of 23 degree tires. <br>
</p>
<p>Ralph in Sask. <br>
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