class (old) to 1868 railway number (s)  quantity year (s) of manufacture    type
0           i a ( de )              1 - 6         6             1839 - 1843  1a1 n2
1                  i b             7 - 15         9             1842 - 1843  1a1 n2
2            ii ( de )            16 - 19         4             1843 - 1844  1a1 n2
3         iii a ( de )            20 - 24         5                    1844  1a1 n2
4         iii b ( de )            25 - 28         4                    1844  1a1 n2
5         iii c ( de )            29 - 36         8                    1845  1a1 n2
6            iv ( de )            37 - 41         5                    1845  1a1 n2
7             v ( de )            42 - 46         5                    1845   1b n2
8            vi ( de )            47 - 54         8                    1845    c n2
9           vii ( de )            55 - 58         4                    1846  2′b n2
10         viii ( de )            59 - 65         7                    1847  1a1 n2
11         viii ( de )                 66         1                    1846  1a1 n2

Table as JSON:
{"class (old) to 1868":{"0":"i a ( de )","1":"i b","2":"ii ( de )","3":"iii a ( de )","4":"iii b ( de )","5":"iii c ( de )","6":"iv ( de )","7":"v ( de )","8":"vi ( de )","9":"vii ( de )","10":"viii ( de )","11":"viii ( de )"},"railway number (s)":{"0":"1 - 6","1":"7 - 15","2":"16 - 19","3":"20 - 24","4":"25 - 28","5":"29 - 36","6":"37 - 41","7":"42 - 46","8":"47 - 54","9":"55 - 58","10":"59 - 65","11":"66"},"quantity":{"0":6,"1":9,"2":4,"3":5,"4":4,"5":8,"6":5,"7":5,"8":8,"9":4,"10":7,"11":1},"year (s) of manufacture":{"0":"1839 - 1843","1":"1842 - 1843","2":"1843 - 1844","3":"1844","4":"1844","5":"1845","6":"1845","7":"1845","8":"1845","9":"1846","10":"1847","11":"1846"},"type":{"0":"1a1 n2","1":"1a1 n2","2":"1a1 n2","3":"1a1 n2","4":"1a1 n2","5":"1a1 n2","6":"1a1 n2","7":"1b n2","8":"c n2","9":"2′b n2","10":"1a1 n2","11":"1a1 n2"}}