<html><head><meta http-equiv="content-type" content="text/html; charset=us-ascii"></head><body dir="auto">no serial numbers but enough descriptive information to probably answer your question. <div><div style="display: block;" class=""><div style="-webkit-user-select: all; -webkit-user-drag: element; display: inline-block;" class="apple-rich-link" draggable="true" role="link" data-url="http://www.tr3a.info/FAQ_heads.htm"><a style="border-radius:10px;font-family:-apple-system, Helvetica, Arial, sans-serif;display:block;-webkit-user-select:none;width:300px;user-select:none;-webkit-user-modify:read-only;user-modify:read-only;overflow:hidden;text-decoration:none;" class="lp-rich-link" rel="nofollow" href="http://www.tr3a.info/FAQ_heads.htm" dir="ltr" role="button" draggable="false" width="300"><table style="table-layout:fixed;border-collapse:collapse;width:300px;background-color:#B7B2BA;font-family:-apple-system, Helvetica, Arial, sans-serif;" class="lp-rich-link-emailBaseTable" cellpadding="0" cellspacing="0" border="0" width="300"><tbody><tr><td vertical-align="center" align="center"><img style="width:300px;filter:brightness(0.97);height:225px;" width="300" height="225" draggable="false" class="lp-rich-link-mediaImage" alt="TRalHead.jpg" src="cid:FB84C6C3-99FB-4FFE-BB34-FC60E5EF4959"></td></tr><tr><td vertical-align="center"><table bgcolor="#B7B2BA" cellpadding="0" cellspacing="0" width="300" style="table-layout:fixed;font-family:-apple-system, Helvetica, Arial, sans-serif;background-color:rgba(183, 178, 186, 1);-apple-color-filter:initial;" class="lp-rich-link-captionBar"><tbody><tr><td style="padding:8px 0px 8px 0px;" class="lp-rich-link-captionBar-textStackItem"><div style="max-width:100%;margin:0px 16px 0px 16px;overflow:hidden;" class="lp-rich-link-captionBar-textStack"><div style="word-wrap:break-word;font-weight:500;font-size:12px;overflow:hidden;text-overflow:ellipsis;text-align:left;" class="lp-rich-link-captionBar-textStack-topCaption-leading"><a rel="nofollow" href="http://www.tr3a.info/FAQ_heads.htm" style="text-decoration: none" draggable="false"><font color="#FFFFFF" style="color: rgba(255, 255, 255, 1);">Triumph TR2-3B FAQ _ Triumph heads</font></a></div><div style="word-wrap:break-word;font-weight:400;font-size:11px;overflow:hidden;text-overflow:ellipsis;text-align:left;" class="lp-rich-link-captionBar-textStack-bottomCaption-leading"><a rel="nofollow" href="http://www.tr3a.info/FAQ_heads.htm" style="text-decoration: none" draggable="false"><font color="#FFFFFF" style="color: rgba(235, 235, 245, 0.6);">tr3a.info</font></a></div></div></td></tr></tbody></table></td></tr></tbody></table></a></div></div><br></div></body></html>