<div dir="ltr">It's an Index Model 40.<div>h<a href="ttp://www.practicalmachinist.com/vb/antique-machinery-history/index-model-40-40h-pics-239816/">ttp://www.practicalmachinist.com/vb/antique-machinery-history/index-model-40-40h-pics-239816/</a><br>
<div><br></div><div>It appears to have a #9 <a href="http://en.wikipedia.org/wiki/Machine_taper#Brown_.26_Sharpe">Brown & Sharpe</a> taper.</div><div><br></div><div>I think these were made in the 1940's.  <a href="http://www.wells-index.com/">Wells-Index</a> is still in business.</div>
<div><br></div><div>-Chancery</div></div></div>