Keywords: Cong Cem DC old Matlovich QR.JPG en QR code on a grave in the Congressional Cemetery in Washington DC a National Historic Landmark After about 9 months the simple laminated paper QR code still works and has survived Hurricane Sandy and a couple of snowstorms but is looking a bit the worse for wear Recommendation if you use this inexpensive type of QR code outside replace every 9-12 months 2013-02-16 13 56 07 own Smallbones cc-zero Uploaded with UploadWizard QRpedia codes at Congressional Cemetery |