number  previous number (s) previous class  converted  withdrawn         disposal
0          1                68845            j52       1952       1958  scrapped (1958)
1    2 (1st)                68816            j52       1952       1956  scrapped (1956)
2    2 (2nd)                68858            j52       1956       1961  scrapped (1961)
3          3                68181             y3       1952       1959  scrapped (1959)
4          4                68132             y1       1952       1959  scrapped (1959)
5          5                68165             y3       1953       1958  scrapped (1958)
6          6                68133             y1       1953       1955  scrapped (1955)
7          7                68166             y3       1953       1964  scrapped (1964)
8          8                68183             y3       1955       1959  scrapped (1959)
9          9                68840            j52       1958       1961  scrapped (1961)
10        10                68911            j50       1961       1965  scrapped (1965)
11        11                68914            j50       1961       1965  scrapped (1965)
12        12                68917            j50       1962       1965  scrapped (1965)
13        13                68928            j50       1962       1965  scrapped (1965)
14        14                68961            j50       1962       1965  scrapped (1965)
15        15                68971            j50       1962       1965  scrapped (1965)
16        16                68976            j50       1962       1965  scrapped (1965)
17        17                61059             b1       1963       1966  scrapped (1966)
18        18                61181             b1       1963       1965  scrapped (1966)
19        19                61204             b1       1963       1966  scrapped (1966)
20        20                61205             b1       1963       1965  scrapped (1966)
21  21 (1st)                68162             y3       1956       1960  scrapped (1960)
22  21 (2nd)                61233             b1       1963       1966  scrapped (1966)
23        22                61252             b1       1963       1964  scrapped (1966)
24        23                61300             b1       1963       1965  scrapped (1966)
25  24 (1st)                61323             b1       1963       1963  scrapped (1964)
26  24 (2nd)                61375             b1       1963       1966  scrapped (1966)
27        25                61272             b1       1965       1966  scrapped (1966)
28        26                61138             b1       1965       1967  scrapped (1968)
29        27                61105             b1       1965       1966  scrapped (1966)
30        28                61194             b1       1965       1966  scrapped (1966)
31        29                61264             b1       1965       1967        preserved
32        30                61050             b1       1966       1968  scrapped (1968)
33  31 (2nd)                61051             b1       1966       1966  scrapped (1966)
34  32 (2nd)                61315             b1       1966       1968  scrapped (1968)

Table as JSON:
{"number":{"0":"1","1":"2 (1st)","2":"2 (2nd)","3":"3","4":"4","5":"5","6":"6","7":"7","8":"8","9":"9","10":"10","11":"11","12":"12","13":"13","14":"14","15":"15","16":"16","17":"17","18":"18","19":"19","20":"20","21":"21 (1st)","22":"21 (2nd)","23":"22","24":"23","25":"24 (1st)","26":"24 (2nd)","27":"25","28":"26","29":"27","30":"28","31":"29","32":"30","33":"31 (2nd)","34":"32 (2nd)"},"previous number (s)":{"0":68845,"1":68816,"2":68858,"3":68181,"4":68132,"5":68165,"6":68133,"7":68166,"8":68183,"9":68840,"10":68911,"11":68914,"12":68917,"13":68928,"14":68961,"15":68971,"16":68976,"17":61059,"18":61181,"19":61204,"20":61205,"21":68162,"22":61233,"23":61252,"24":61300,"25":61323,"26":61375,"27":61272,"28":61138,"29":61105,"30":61194,"31":61264,"32":61050,"33":61051,"34":61315},"previous class":{"0":"j52","1":"j52","2":"j52","3":"y3","4":"y1","5":"y3","6":"y1","7":"y3","8":"y3","9":"j52","10":"j50","11":"j50","12":"j50","13":"j50","14":"j50","15":"j50","16":"j50","17":"b1","18":"b1","19":"b1","20":"b1","21":"y3","22":"b1","23":"b1","24":"b1","25":"b1","26":"b1","27":"b1","28":"b1","29":"b1","30":"b1","31":"b1","32":"b1","33":"b1","34":"b1"},"converted":{"0":1952,"1":1952,"2":1956,"3":1952,"4":1952,"5":1953,"6":1953,"7":1953,"8":1955,"9":1958,"10":1961,"11":1961,"12":1962,"13":1962,"14":1962,"15":1962,"16":1962,"17":1963,"18":1963,"19":1963,"20":1963,"21":1956,"22":1963,"23":1963,"24":1963,"25":1963,"26":1963,"27":1965,"28":1965,"29":1965,"30":1965,"31":1965,"32":1966,"33":1966,"34":1966},"withdrawn":{"0":1958,"1":1956,"2":1961,"3":1959,"4":1959,"5":1958,"6":1955,"7":1964,"8":1959,"9":1961,"10":1965,"11":1965,"12":1965,"13":1965,"14":1965,"15":1965,"16":1965,"17":1966,"18":1965,"19":1966,"20":1965,"21":1960,"22":1966,"23":1964,"24":1965,"25":1963,"26":1966,"27":1966,"28":1967,"29":1966,"30":1966,"31":1967,"32":1968,"33":1966,"34":1968},"disposal":{"0":"scrapped (1958)","1":"scrapped (1956)","2":"scrapped (1961)","3":"scrapped (1959)","4":"scrapped (1959)","5":"scrapped (1958)","6":"scrapped (1955)","7":"scrapped (1964)","8":"scrapped (1959)","9":"scrapped (1961)","10":"scrapped (1965)","11":"scrapped (1965)","12":"scrapped (1965)","13":"scrapped (1965)","14":"scrapped (1965)","15":"scrapped (1965)","16":"scrapped (1965)","17":"scrapped (1966)","18":"scrapped (1966)","19":"scrapped (1966)","20":"scrapped (1966)","21":"scrapped (1960)","22":"scrapped (1966)","23":"scrapped (1966)","24":"scrapped (1966)","25":"scrapped (1964)","26":"scrapped (1966)","27":"scrapped (1966)","28":"scrapped (1968)","29":"scrapped (1966)","30":"scrapped (1966)","31":"preserved","32":"scrapped (1968)","33":"scrapped (1966)","34":"scrapped (1968)"}}