{"version":"1.0","provider_name":"Tim Stentiford","provider_url":"https:\/\/mexicoplates.com\/en","author_name":"timstentiford","author_url":"https:\/\/mexicoplates.com\/en\/author\/timstentiford\/","title":"New Clues for 1922 M de M Mystery - Tim Stentiford","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"ueI4I8JPCv\"><a href=\"https:\/\/mexicoplates.com\/en\/2026\/07\/08\/new-clues-for-1922-m-de-m-mystery\/\">New Clues for 1922 M de M Mystery<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/mexicoplates.com\/en\/2026\/07\/08\/new-clues-for-1922-m-de-m-mystery\/embed\/#?secret=ueI4I8JPCv\" width=\"600\" height=\"338\" title=\"&#8220;New Clues for 1922 M de M Mystery&#8221; &#8212; Tim Stentiford\" data-secret=\"ueI4I8JPCv\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/mexicoplates.com\/wp-includes\/js\/wp-embed.min.js\n<\/script>","thumbnail_url":"https:\/\/mexicoplates.com\/wp-content\/uploads\/2026\/07\/Edo-Mex-MdeM-1922-689.jpeg","thumbnail_width":1536,"thumbnail_height":1676,"description":"Where is this 1922 plate from?\u00a0 \u00a0Is it indeed from Mexico, but long believed.\u00a0 But no one has definitive proof and there have been many questions.\u00a0 For examples, the surviving examples (at least two are known) are all five digits long, which seemed very high.\u00a0 It must be from Mexico City, but the &#8220;M de [&hellip;]"}