Portland images: Northwestern Steam Electric Co. Montreal images: Bell Canada Cambridge: F. Burwick, Sanitary Engineer Cambridge: Hayward's Patent Self Locking iron cove… Cambridge: Manhole cover G.P.O. Manhole cover Stedelijke Gasfabriek (City Gas Works) Sewer cover of the Kon. Nederlandse Grofsmederij Sewer cover by G.J. v.d. Broek of Haarlem Some details from Leiden Manhole cover New, unconnected sewer cover Gebruik Touw Manhole cover Dijka of Steenwijk Sewer cover of the Koninklijke Nederlandse Grofsme… Sewer cover of B. Ubbink & Co Yzergietery of Doesb… Sewer cover of the Koninklijke Nederlandse Grofsme… More drain covers: P. Konings, Swalmen More drain covers: Trip More drain covers: W. ten Cate en Zn, Almelo More drain covers: Gemeente Leiden 1967 Drain cover Drain cover of the Koninklijke Nederlandse Grofsme… Drain cover of the Koninklijke Nederlandse Grofsme… More drain covers: Grofsmederij Leiden More drain covers: Grofsmederij Leiden Drain cover of Overyselsche IJzergieterij of Deven… Drain cover of Polva Pipelife Nameless drain cover Drain cover of Deltaplast Drain cover of Heenk IJzerwaren of Haarlem (NL) Manhole cover of the Nederlandse Grofsmederij Another drain cover of the Overijselsche IJzergiet… Cover of the Kadaster (Land Registry) Drain cover of Joosten Kunststoffen A open manhole – manhole cover of TBS Manhole cover of Nering Bögel of the post-1928 per… Drain cover of Nering Bögel of the post-1955 perio… Drain cover of Nering Bögel of the pre-1932 period Drain cover of Wavin – klasse X Drain cover of Vulcanus of Doetinchem (NL) Wijnand Wouter van der Vet drain cover (1897–1914) Drain cover of the Leiden city council 1971 1929 Arsenal-Wien X drain cover OEWA-WIEN X drain cover of 1930 1958 drain cover of Vienna 1932 drain cover of Vienna Viennese drain covers: H. Egar of Vienna Viennese drain covers: An 1896 drain cover Drain cover of the Akt.-Ges. Waagner, Biro, Kurz –… Manhole cover from the time of the Kaiser – KK Sta… 1902 MWAG no. 535 drain cover STAATSTELEFON Drain cover from Roman times Drain cover of Vogelsinger & Pastree of Vienna-Sim… Drain cover of Julius Pastree of Vienna-Simmering Drain cover of Rey Frères of Brussels in The Hague Drain and manhole covers of TBS Drain and manhole covers of TBS Drain and manhole covers of TBS Drain and manhole covers of TBS