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There are 3114 manhole covers that belong to category Unknown: Show on map Thumbnails mode
1901 Manchester - Diagonal cover with background of triangles
1902 Susya - a concrete cover with a background of squares
1903 Warsaw - Hydrokan Winkiel
1904 Makrinitsa - Cover with checkered background
1905 St. John’s, NL - Lid made by Josam
1906 Manchester - a rectangular kerbside cover
1907 Athens - EEY
1908 Warsaw - a round lid with circles of squares and an outer ring in a Greek pattern
1909 Broadway, Worcestershire - Air Tight Inspection Cover
1910 East Olympos - Cover with background of pegs
1911 Thessaloniki - Thessaloniki - cover with text on it
1912 Warsaw - a lid with a pattern consisting of circles of squares
1913 Manchester - a cover with a background of short horizontal and vertical lines
1914 Kajetany - PPT Pyrzyce
1915 Glasgow - Nuneaton cover
1916 Hydra (Hydra) - XTREME CASTING cover
1917 Glasgow - A cover with a background with round bumps
1918 Manchester - modular diagonal cover made by Wrekin
1919 Ivano-Frankivsk - A cover with circles of rhombuses and straight lines
1920 Kastrup - Copenhagen Airport - A cover with a network of circles
1921 Copenhagen - A cover with many circles composed of squares
1922 Mexico City - cover with Astra manufacturer logo on it
1923 Warsaw - Lid of type Korum
1924 Warsaw - a lid that is partially covered with concrete (3)
1925 Warsaw - square lid with a background of squares made by KZO
58 Peter St, Manchester M2 3NQ, UK
Susya, Palestine
Powstańców Śląskich 90, 01-493 Warszawa, Poland
Οdos xoris onomasia, Makrinitsa 370 11, Greece
9 Westerland Rd, St. John’s, NL A1B 3R7, Canada
2 Oxford St, Manchester M1 4PB, UK
Patriarchou Ioakim 19, Athina 106 75, Greece
Gąsek 74a, 02-796 Warszawa, Poland
Peters Farm, Broadway WR12 7LB, UK
2HHF+2C East Olympos, Greece
Proxenou Koromila 42, Thessaloniki 546 22, Greece
Smardzewska 80/86, 04-725 Warszawa, Poland
2 Oxford St, Manchester M1 4PB, UK
Mokra 7, 05-830 Kajetany, Poland
22 Rose St, Glasgow G3 6RB, UK
Ikonomou STR, Idra 180 40, Greece
98 Bath St, Glasgow G2 2EN, UK
135a Oxford Rd, Manchester M1 7DY, UK
Затишна вулиця, 12, Ivano-Frankivs’k, Ivano-Frankivs’ka oblast, Ukraine, 76000
Københavns Lufthavn (Ellehammersvej), 2770 Kastrup, Denmark
Admiralkaj, Toldbodgade, 1253 København, Denmark
Tepic 31A, Roma Sur, Cuauhtémoc, 06760 Ciudad de México, CDMX, Mexico
Szamocka 10B, 01-748 Warszawa, Poland
Aleja Armii Ludowej, 00-638 Warszawa, Poland
Agrykola 9, 00-460 Warszawa, Poland
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