--- title: "Proven and Reliable! 🔧 | Blog | Grünig-SignTronic AG" description: Our classic D-Series machines are freshly built and ready to go! image: https://www.grunig-signtronic.com/_astro/1725343855249.DW6eSkAG.jpg --- > Documentation Index > Fetch the complete site index at: https://www.grunig-signtronic.com/llms.txt > Use this file to discover all available pages before exploring further. Blog # Proven and Reliable! 🔧 Our classic D-Series machines are freshly built and ready to go! Admin • September 3, 2024 • 1 min read Our classic D-Series machines are freshly built and ready to go! Up front, we have the compact **STM-1010**, 2.4 meters wide and 2 meters tall, soon to demonstrate its precision in Portugal 🇵🇹. In the background stands the heavyweight **STM-4120** for Belgium 🇧🇪 – over 5 meters long and 3.5 meters tall. This machine has already been disassembled and is ready to embark on its journey. Both machines are equipped with our trusted **LED\_Q4 light source** and will soon be producing “**THE PERFECT SCREEN**”. **_Tried-and-true technology – newly built and ready for action!_** ```json {"@context":"https://schema.org","@type":"WebPage","@id":"https://www.grunig-signtronic.com/en/company/news/blog/proven-and-reliable#webpage","url":"https://www.grunig-signtronic.com/en/company/news/blog/proven-and-reliable","name":"Proven and Reliable! 🔧 | Blog | Grünig-SignTronic AG","description":"Our classic D-Series machines are freshly built and ready to go!","inLanguage":"en-US","isPartOf":{"@id":"https://www.grunig-signtronic.com/#website"},"about":{"@id":"https://www.grunig-signtronic.com/#organization"},"primaryImageOfPage":{"@type":"ImageObject","url":"https://www.grunig-signtronic.com/_astro/1725343855249.DW6eSkAG.jpg"}} {"@context":"https://schema.org","@type":"Organization","@id":"https://www.grunig-signtronic.com/#organization","name":"Grünig-SignTronic AG","legalName":"Grünig-SignTronic AG","url":"https://www.grunig-signtronic.com/","logo":{"@type":"ImageObject","url":"https://www.grunig-signtronic.com/images/og-image.jpg","width":1200,"height":630},"image":"https://www.grunig-signtronic.com/images/og-image.jpg","description":"Screen printing automation and screen production systems","foundingDate":"1967","vatID":"CH-035.3.007.501-8","taxID":"CHE-102.614.679","address":[{"@type":"PostalAddress","streetAddress":"Ringgenmatt 14","postalCode":"3150","addressLocality":"Schwarzenburg","addressRegion":"Bern","addressCountry":"CH"},{"@type":"PostalAddress","streetAddress":"Rossrütistrasse 4","postalCode":"9464","addressLocality":"Rüthi (SG)","addressRegion":"St. Gallen","addressCountry":"CH"}],"location":[{"@type":"Place","name":"Schwarzenburg","address":{"@type":"PostalAddress","streetAddress":"Ringgenmatt 14","postalCode":"3150","addressLocality":"Schwarzenburg","addressRegion":"Bern","addressCountry":"CH"},"geo":{"@type":"GeoCoordinates","latitude":46.8226846,"longitude":7.3466721}},{"@type":"Place","name":"Rüthi (SG)","address":{"@type":"PostalAddress","streetAddress":"Rossrütistrasse 4","postalCode":"9464","addressLocality":"Rüthi (SG)","addressRegion":"St. Gallen","addressCountry":"CH"},"geo":{"@type":"GeoCoordinates","latitude":47.2998223,"longitude":9.5485221}}],"areaServed":"Worldwide","telephone":"+41 31 734 26 00","email":"info@grunig-signtronic.com","contactPoint":[{"@type":"ContactPoint","telephone":"+41 31 734 26 00","contactType":"customer service","areaServed":"Worldwide","availableLanguage":["en","de","fr","it","es","pt"],"email":"info@grunig-signtronic.com"}],"sameAs":["https://www.youtube.com/GrunigInterscreen","https://www.linkedin.com/company/grunig-signtronic","https://www.instagram.com/grunig_signtronic","https://www.facebook.com/GrunigInterscreen","https://github.com/grunig-release","https://vimeo.com/grunig"],"knowsAbout":["Screen Printing","Screen Production","Industrial Automation","CTS Technology","Computer-to-Screen","Screen Stretching","Screen Coating","Screen Washing","Textile Printing","Industrial Printing"],"keywords":"Blog"} {"@context":"https://schema.org","@type":"WebSite","@id":"https://www.grunig-signtronic.com/#website","url":"https://www.grunig-signtronic.com/","name":"Grünig-SignTronic AG","description":"Over 55 years of screen printing expertise. 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